avoid relaying changes if theres no one listening to the passthrough

in testing 84 dense cells could sustain MAX Integer on a FE p2p pair

gradle.properties

@@ -3,7 +3,7 @@ aechannel=stable
 aebuild=7
 aegroup=appeng
 aebasename=appliedenergistics2
-trousers=omni-fixes-v21b
+trousers=omni-fixes-v44
 
 #########################################################
 # Versions                                              #

gradle/scripts/dependencies.gradle

@@ -80,7 +80,7 @@ configurations {
 }
 
 dependencies {
-    compileOnly "gregtechce:gregtech:1.12.2:1.12.0.662"
+    compileOnly "gregtechce:gregtech:1.12.2:1.15.1.735"
 
     // installable runtime dependencies
     mods "mcp.mobius.waila:Hwyla:${hwyla_version}"

src/api/java/appeng/api/config/Upgrades.java

@@ -46,7 +46,8 @@ public enum Upgrades
 	 */
 	FUZZY( 1 ),
 	SPEED( 1 ),
-	INVERTER( 1 );
+	INVERTER( 1 ),
+	PATTERN_EXPANSION(1);
 
 	private final int tier;
 	private final Map<ItemStack, Integer> supportedMax = new HashMap<>();

src/api/java/appeng/api/definitions/IMaterials.java

@@ -89,6 +89,8 @@ public interface IMaterials
 
 	IItemDefinition cardCapacity();
 
+	IItemDefinition cardPatternExpansion();
+
 	IItemDefinition cardFuzzy();
 
 	IItemDefinition cardInverter();

src/api/java/appeng/api/networking/crafting/ICraftingPatternDetails.java

@@ -31,6 +31,9 @@ import net.minecraft.world.World;
 import appeng.api.implementations.ICraftingPatternItem;
 import appeng.api.storage.data.IAEItemStack;
 
+import java.util.Collections;
+import java.util.List;
+
 
 /**
  * do not implement provided by {@link ICraftingPatternItem}
@@ -84,6 +87,11 @@ public interface ICraftingPatternDetails
 	 */
 	boolean canSubstitute();
 
+	default List<IAEItemStack> getSubstituteInputs( int slot )
+	{
+		return Collections.emptyList();
+	}
+
 	/**
 	 * Allow using this INSTANCE of the pattern details to preform the crafting action with performance enhancements.
 	 *

src/api/java/appeng/api/networking/storage/IStackWatcherHost.java

@@ -44,11 +44,8 @@ public interface IStackWatcherHost
 	/**
 	 * Called when a watched item changes amounts.
 	 *
-	 * @param o changed item list
-	 * @param fullStack old stack
 	 * @param diffStack new stack
-	 * @param src action source
 	 * @param chan storage channel
 	 */
-	void onStackChange( IItemList<?> o, IAEStack<?> fullStack, IAEStack<?> diffStack, IActionSource src, IStorageChannel<?> chan );
+	void onStackChange( IAEStack<?> diffStack, IStorageChannel<?> chan );
 }

src/api/java/appeng/api/storage/IMEMonitorHandlerReceiver.java

@@ -52,4 +52,9 @@ public interface IMEMonitorHandlerReceiver<T extends IAEStack<T>>
 	 * called when the list updates its contents, this is mostly for handling power events.
 	 */
 	void onListUpdate();
+
+	default boolean hasListeners()
+	{
+		return true;
+	}
 }

src/api/java/appeng/api/storage/data/IAEItemStack.java

@@ -112,4 +112,13 @@ public interface IAEItemStack extends IAEStack<IAEItemStack>
 	 * @return definition stack
 	 */
 	ItemStack getDefinition();
+
+	/**
+	 * Compare this AE item stack to another item stack, but ignores
+	 * the amount. It checks the item type, NBT and damage values.
+	 *
+	 * @param is An item stack
+	 */
+	boolean equals(ItemStack is);
+
 }

src/main/java/appeng/client/gui/implementations/GuiInterface.java

@@ -50,7 +50,7 @@ public class GuiInterface extends GuiUpgradeable
 	public GuiInterface( final InventoryPlayer inventoryPlayer, final IInterfaceHost te )
 	{
 		super( new ContainerInterface( inventoryPlayer, te ) );
-		this.ySize = 211;
+		this.ySize = 256;
 	}
 
 	@Override
@@ -62,8 +62,7 @@ public class GuiInterface extends GuiUpgradeable
 		this.BlockMode = new GuiImgButton( this.guiLeft - 18, this.guiTop + 8, Settings.BLOCK, YesNo.NO );
 		this.buttonList.add( this.BlockMode );
 
-		this.interfaceMode = new GuiToggleButton( this.guiLeft - 18, this.guiTop + 26, 84, 85, GuiText.InterfaceTerminal
-				.getLocal(), GuiText.InterfaceTerminalHint.getLocal() );
+		this.interfaceMode = new GuiToggleButton( this.guiLeft - 18, this.guiTop + 26, 84, 85, GuiText.InterfaceTerminal.getLocal(), GuiText.InterfaceTerminalHint.getLocal() );
 		this.buttonList.add( this.interfaceMode );
 	}
 
@@ -86,13 +85,20 @@ public class GuiInterface extends GuiUpgradeable
 		this.fontRenderer.drawString( GuiText.StoredItems.getLocal(), 8, 6 + 60 + 7, 4210752 );
 		this.fontRenderer.drawString( GuiText.Patterns.getLocal(), 8, 6 + 73 + 7, 4210752 );
 
-		this.fontRenderer.drawString( GuiText.inventory.getLocal(), 8, this.ySize - 96 + 3, 4210752 );
 	}
 
 	@Override
 	protected String getBackground()
 	{
-		return "guis/interface.png";
+		int upgrades = ( (ContainerInterface) this.cvb ).getPatternUpgrades();
+		if( upgrades == 0 )
+		{
+			return "guis/newinterface.png";
+		}
+		else
+		{
+			return "guis/newinterface" + upgrades + ".png";
+		}
 	}
 
 	@Override
@@ -117,4 +123,5 @@ public class GuiInterface extends GuiUpgradeable
 			NetworkHandler.instance().sendToServer( new PacketConfigButton( this.BlockMode.getSetting(), backwards ) );
 		}
 	}
+
 }

src/main/java/appeng/client/gui/implementations/GuiInterfaceTerminal.java

@@ -24,8 +24,13 @@ import java.util.*;
 
 import appeng.api.config.ActionItems;
 import appeng.api.config.Settings;
+import appeng.api.config.Upgrades;
 import appeng.client.gui.widgets.GuiImgButton;
 import appeng.core.worlddata.IWorldPlayerMapping;
+import appeng.helpers.DualityInterface;
+import appeng.parts.misc.PartInterface;
+import appeng.tile.inventory.AppEngInternalInventory;
+import appeng.tile.misc.TileInterface;
 import appeng.util.BlockPosUtils;
 import com.google.common.collect.HashMultimap;
 
@@ -69,6 +74,7 @@ public class GuiInterfaceTerminal extends AEBaseGui
 	private final HashMultimap<String, ClientDCInternalInv> byName = HashMultimap.create();
 	private final HashMap<ClientDCInternalInv,BlockPos> blockPosHashMap = new HashMap<>();
 	private final HashMap<GuiButton,ClientDCInternalInv> guiButtonHashMap = new HashMap<>();
+	private final Map<ClientDCInternalInv,Integer> numUpgradesMap = new HashMap<>();
 	private final ArrayList<String> names = new ArrayList<>();
 	private final ArrayList<Object> lines = new ArrayList<>();
 	private final Set<Object> matchedStacks = new HashSet<>();
@@ -91,7 +97,7 @@ public class GuiInterfaceTerminal extends AEBaseGui
 		final GuiScrollbar scrollbar = new GuiScrollbar();
 		this.setScrollBar( scrollbar );
 		this.xSize = 208;
-		this.ySize = 256;
+		this.ySize = 255;
 	}
 
 	@Override
@@ -136,36 +142,43 @@ public class GuiInterfaceTerminal extends AEBaseGui
 		this.fontRenderer.drawString( this.getGuiDisplayName( GuiText.InterfaceTerminal.getLocal() ), 8, 6, 4210752 );
 		this.fontRenderer.drawString( GuiText.inventory.getLocal(), this.offsetX + 2, this.ySize - 96 + 3, 4210752 );
 
-		final int ex = this.getScrollBar().getCurrentScroll();
+		final int currentScroll = this.getScrollBar().getCurrentScroll();
 
-		this.guiButtonNextAssembler = new GuiImgButton(guiLeft + 123, guiTop + 25,Settings.ACTIONS, ActionItems.FREE_MOLECULAR_SLOT_SHORTCUT);
+		this.guiButtonNextAssembler = new GuiImgButton( guiLeft + 123, guiTop + 25, Settings.ACTIONS, ActionItems.FREE_MOLECULAR_SLOT_SHORTCUT );
 		this.buttonList.add( guiButtonNextAssembler );
 
-		guiButtonHide = new GuiImgButton( guiLeft + 141, guiTop + 25,Settings.ACTIONS, this.partInterfaceTerminal.onlyInterfacesWithFreeSlots ?
-																							ActionItems.TOGGLE_SHOW_FULL_INTERFACES_OFF :
-																							ActionItems.TOGGLE_SHOW_FULL_INTERFACES_ON);
+		guiButtonHide = new GuiImgButton( guiLeft + 141, guiTop + 25, Settings.ACTIONS, this.partInterfaceTerminal.onlyInterfacesWithFreeSlots ? ActionItems.TOGGLE_SHOW_FULL_INTERFACES_OFF : ActionItems.TOGGLE_SHOW_FULL_INTERFACES_ON );
 		this.buttonList.add( guiButtonHide );
 
 		this.inventorySlots.inventorySlots.removeIf( slot -> slot instanceof SlotDisconnected );
 
-		int offset = 51;
-		for( int x = 0; x < LINES_ON_PAGE && ex + x < this.lines.size(); x++ )
+		int offset = 52;
+		int linesDraw = 0;
+		for( int x = 0; x < LINES_ON_PAGE && linesDraw < LINES_ON_PAGE && currentScroll + x < this.lines.size(); x++ )
 		{
-			final Object lineObj = this.lines.get( ex + x );
+			final Object lineObj = this.lines.get( currentScroll + x );
 			if( lineObj instanceof ClientDCInternalInv )
 			{
 				final ClientDCInternalInv inv = (ClientDCInternalInv) lineObj;
-				for( int z = 0; z < inv.getInventory().getSlots(); z++ )
-				{
-					this.inventorySlots.inventorySlots.add( new SlotDisconnected( inv, z, z * 18 + 22, 1 + offset ) );
-					if (this.matchedStacks.contains(inv.getInventory().getStackInSlot(z)))
-						drawRect( z * 18 + 22, 1 + offset, z * 18 + 22 + 16, 1 + offset + 16, 0x2A00FF00 );
-				}
 
-				GuiButton guiButton = new GuiImgButton(guiLeft + 4, guiTop + offset + 1, Settings.ACTIONS, ActionItems.HIGHLIGHT_INTERFACE);
-				guiButtonHashMap.put( guiButton , inv);
+				GuiButton guiButton = new GuiImgButton( guiLeft + 4, guiTop + offset, Settings.ACTIONS, ActionItems.HIGHLIGHT_INTERFACE );
+				guiButtonHashMap.put( guiButton, inv );
 				this.buttonList.add( guiButton );
+				int extraLines = numUpgradesMap.get( inv );
 
+				for( int row = 0; row < 1 + extraLines && linesDraw < LINES_ON_PAGE ; ++row )
+				{
+					for( int z = 0; z < 9 ; z++ )
+					{
+						this.inventorySlots.inventorySlots.add( new SlotDisconnected( inv, z + ( row * 9 ), ( z * 18 + 22 ), offset ) );
+						if( this.matchedStacks.contains( inv.getInventory().getStackInSlot( z + ( row * 9 ) ) ) )
+						{
+							drawRect( z * 18 + 22, offset, z * 18 + 22 + 16, offset + 16, 0x2A00FF00 );
+						}
+					}
+					linesDraw++;
+					offset += 18;
+				}
 			}
 			else if( lineObj instanceof String )
 			{
@@ -176,17 +189,17 @@ public class GuiInterfaceTerminal extends AEBaseGui
 					name = name + " (" + rows + ')';
 				}
 
-				while( name.length() > 2 && this.fontRenderer.getStringWidth( name ) > 155 )
+				while ( name.length() > 2 && this.fontRenderer.getStringWidth( name ) > 155 )
 				{
 					name = name.substring( 0, name.length() - 1 );
 				}
-
-				this.fontRenderer.drawString( name, this.offsetX + 2, 6 + offset, 4210752 );
+				this.fontRenderer.drawString( name, this.offsetX + 2, 5 + offset, 4210752 );
+				linesDraw++;
+				offset += 18;
 			}
-			offset += 18;
 		}
 
-		if( searchFieldInputs.isMouseIn( mouseX , mouseY ) ) drawTooltip( Mouse.getEventX() * this.width / this.mc.displayWidth - offsetX, mouseY - guiTop, "Inputs OR names" );
+		if( searchFieldInputs.isMouseIn( mouseX, mouseY ) ) drawTooltip( Mouse.getEventX() * this.width / this.mc.displayWidth - offsetX, mouseY - guiTop, "Inputs OR names" );
 		else if( searchFieldOutputs.isMouseIn( mouseX, mouseY ) ) drawTooltip( Mouse.getEventX() * this.width / this.mc.displayWidth - offsetX, mouseY - guiTop, "Outputs OR names" );
 
 	}
@@ -264,19 +277,28 @@ public class GuiInterfaceTerminal extends AEBaseGui
 
 		int offset = 51;
 		final int ex = this.getScrollBar().getCurrentScroll();
-
-		for( int x = 0; x < LINES_ON_PAGE && ex + x < this.lines.size(); x++ )
+		int linesDraw = 0;
+		for( int x = 0; x < LINES_ON_PAGE && linesDraw < LINES_ON_PAGE && ex + x < this.lines.size(); x++ )
 		{
 			final Object lineObj = this.lines.get( ex + x );
 			if( lineObj instanceof ClientDCInternalInv )
 			{
-				final ClientDCInternalInv inv = (ClientDCInternalInv) lineObj;
-
 				GlStateManager.color( 1, 1, 1, 1 );
-				final int width = inv.getInventory().getSlots() * 18;
-				this.drawTexturedModalRect( offsetX + 20, offsetY + offset, 20, 173, width, 18 );
+				final int width = 9 * 18;
+
+				int extraLines = numUpgradesMap.get( lineObj );
+
+				for( int row = 0; row < 1 + extraLines && linesDraw < LINES_ON_PAGE; ++row )
+				{
+					this.drawTexturedModalRect( offsetX + 20, offsetY + offset , 20, 173, width, 18 );
+					offset += 18;
+					linesDraw++;
+				}
+			}
+			else {
+				offset += 18;
+				linesDraw++;
 			}
-			offset += 18;
 		}
 
 		if( this.searchFieldInputs != null )
@@ -337,6 +359,7 @@ public class GuiInterfaceTerminal extends AEBaseGui
 					final ClientDCInternalInv current = this.getById( id, invData.getLong( "sortBy" ), invData.getString( "un" ) );
 					blockPosHashMap.put( current, NBTUtil.getPosFromTag( invData.getCompoundTag( "pos" )) );
 					dimHashMap.put( current, invData.getInteger( "dim" ));
+					numUpgradesMap.put( current, invData.getInteger("numUpgrades"));
 
 					for( int x = 0; x < current.getInventory().getSlots(); x++ )
 					{
@@ -395,8 +418,12 @@ public class GuiInterfaceTerminal extends AEBaseGui
 			// Search if the current inventory holds a pattern containing the search term.
 			if( !found )
 			{
+				int slot = 0;
 				for( final ItemStack itemStack : entry.getInventory() )
 				{
+					if (slot > 8 + numUpgradesMap.get(entry) * 9) {
+						break;
+					}
 					if( !searchFieldInputs.isEmpty() && !searchFieldOutputs.isEmpty() ) {
 						if (this.itemStackMatchesSearchTerm(itemStack, searchFieldInputs, 0) || this.itemStackMatchesSearchTerm(itemStack, searchFieldOutputs, 1)) {
 							found = true;
@@ -418,6 +445,7 @@ public class GuiInterfaceTerminal extends AEBaseGui
 					// If only Interfaces with empty slots should be shown, check that here
 					if(itemStack.isEmpty())
 						interfaceHasFreeSlots = true;
+					slot++;
 				}
 			}
 			// if found, filter skipped or machine name matching the search term, add it
@@ -458,7 +486,7 @@ public class GuiInterfaceTerminal extends AEBaseGui
 			this.lines.addAll( clientInventories );
 		}
 
-		this.getScrollBar().setRange( 0, this.lines.size() - LINES_ON_PAGE, 2 );
+		this.getScrollBar().setRange( 0, this.lines.size() - 1, 1 );
 	}
 
 	private boolean itemStackMatchesSearchTerm( final ItemStack itemStack, final String searchTerm,int pass )
@@ -548,7 +576,7 @@ public class GuiInterfaceTerminal extends AEBaseGui
 
 		if( o == null )
 		{
-			this.byId.put( id, o = new ClientDCInternalInv( 9, id, sortBy, string ) );
+			this.byId.put( id, o = new ClientDCInternalInv( DualityInterface.NUMBER_OF_PATTERN_SLOTS, id, sortBy, string ) );
 			this.refreshList = true;
 		}
 

src/main/java/appeng/container/implementations/ContainerCraftingCPU.java

@@ -159,56 +159,58 @@ public class ContainerCraftingCPU extends AEBaseContainer implements IMEMonitorH
 	@Override
 	public void detectAndSendChanges()
 	{
-		if( Platform.isServer() && this.getMonitor() != null && !this.list.isEmpty() )
+		if( Platform.isServer() && this.getMonitor() != null )
 		{
-			try
+			if( this.getEstimatedTime() >= 0 )
 			{
-				if( this.getEstimatedTime() >= 0 )
+				final long elapsedTime = this.getMonitor().getElapsedTime();
+				final double remainingItems = this.getMonitor().getRemainingItemCount();
+				final double startItems = this.getMonitor().getStartItemCount();
+				final long eta = (long) ( elapsedTime / Math.max( 1d, ( startItems - remainingItems ) ) * remainingItems );
+				this.setEstimatedTime( eta );
+			}
+			if( !this.list.isEmpty() )
+			{
+				try
 				{
-					final long elapsedTime = this.getMonitor().getElapsedTime();
-					final double remainingItems = this.getMonitor().getRemainingItemCount();
-					final double startItems = this.getMonitor().getStartItemCount();
-					final long eta = (long) ( elapsedTime / Math.max( 1d, ( startItems - remainingItems ) ) * remainingItems );
-					this.setEstimatedTime( eta );
-				}
+					final PacketMEInventoryUpdate a = new PacketMEInventoryUpdate( (byte) 0 );
+					final PacketMEInventoryUpdate b = new PacketMEInventoryUpdate( (byte) 1 );
+					final PacketMEInventoryUpdate c = new PacketMEInventoryUpdate( (byte) 2 );
 
-				final PacketMEInventoryUpdate a = new PacketMEInventoryUpdate( (byte) 0 );
-				final PacketMEInventoryUpdate b = new PacketMEInventoryUpdate( (byte) 1 );
-				final PacketMEInventoryUpdate c = new PacketMEInventoryUpdate( (byte) 2 );
-
-				for( final IAEItemStack out : this.list )
-				{
-					a.appendItem( this.getMonitor().getItemStack( out, CraftingItemList.STORAGE ) );
-					b.appendItem( this.getMonitor().getItemStack( out, CraftingItemList.ACTIVE ) );
-					c.appendItem( this.getMonitor().getItemStack( out, CraftingItemList.PENDING ) );
-				}
-
-				this.list.resetStatus();
-
-				for( final Object g : this.listeners )
-				{
-					if( g instanceof EntityPlayer )
+					for( final IAEItemStack out : this.list )
 					{
-						if( !a.isEmpty() )
-						{
-							NetworkHandler.instance().sendTo( a, (EntityPlayerMP) g );
-						}
+						a.appendItem( this.getMonitor().getItemStack( out, CraftingItemList.STORAGE ) );
+						b.appendItem( this.getMonitor().getItemStack( out, CraftingItemList.ACTIVE ) );
+						c.appendItem( this.getMonitor().getItemStack( out, CraftingItemList.PENDING ) );
+					}
 
-						if( !b.isEmpty() )
-						{
-							NetworkHandler.instance().sendTo( b, (EntityPlayerMP) g );
-						}
+					this.list.resetStatus();
 
-						if( !c.isEmpty() )
+					for( final Object g : this.listeners )
+					{
+						if( g instanceof EntityPlayer )
 						{
-							NetworkHandler.instance().sendTo( c, (EntityPlayerMP) g );
+							if( !a.isEmpty() )
+							{
+								NetworkHandler.instance().sendTo( a, (EntityPlayerMP) g );
+							}
+
+							if( !b.isEmpty() )
+							{
+								NetworkHandler.instance().sendTo( b, (EntityPlayerMP) g );
+							}
+
+							if( !c.isEmpty() )
+							{
+								NetworkHandler.instance().sendTo( c, (EntityPlayerMP) g );
+							}
 						}
 					}
 				}
-			}
-			catch( final IOException e )
-			{
-				// :P
+				catch( final IOException e )
+				{
+					// :P
+				}
 			}
 		}
 		super.detectAndSendChanges();

src/main/java/appeng/container/implementations/ContainerInterface.java

@@ -19,6 +19,9 @@
 package appeng.container.implementations;
 
 
+import appeng.api.config.Upgrades;
+import appeng.container.slot.*;
+import appeng.util.Platform;
 import net.minecraft.entity.player.InventoryPlayer;
 
 import appeng.api.config.SecurityPermissions;
@@ -26,14 +29,11 @@ import appeng.api.config.Settings;
 import appeng.api.config.YesNo;
 import appeng.api.util.IConfigManager;
 import appeng.container.guisync.GuiSync;
-import appeng.container.slot.SlotFake;
-import appeng.container.slot.SlotNormal;
-import appeng.container.slot.SlotRestrictedInput;
 import appeng.helpers.DualityInterface;
 import appeng.helpers.IInterfaceHost;
 
 
-public class ContainerInterface extends ContainerUpgradeable
+public class ContainerInterface extends ContainerUpgradeable implements IOptionalSlotHost
 {
 
 	private final DualityInterface myDuality;
@@ -44,16 +44,22 @@ public class ContainerInterface extends ContainerUpgradeable
 	@GuiSync( 4 )
 	public YesNo iTermMode = YesNo.YES;
 
+	@GuiSync( 7 )
+	public int patternExpansions = 0;
+
 	public ContainerInterface( final InventoryPlayer ip, final IInterfaceHost te )
 	{
 		super( ip, te.getInterfaceDuality().getHost() );
 
 		this.myDuality = te.getInterfaceDuality();
 
-		for( int x = 0; x < DualityInterface.NUMBER_OF_PATTERN_SLOTS; x++ )
+		for (int row = 0 ; row < 4 ; ++row)
 		{
-			this.addSlotToContainer( new SlotRestrictedInput( SlotRestrictedInput.PlacableItemType.ENCODED_PATTERN, this.myDuality
-					.getPatterns(), x, 8 + 18 * x, 90 + 7, this.getInventoryPlayer() ).setStackLimit( 1 ) );
+			for( int x = 0; x < 9; x++ )
+			{
+				this.addSlotToContainer( new OptionalSlotRestrictedInput( SlotRestrictedInput.PlacableItemType.ENCODED_PATTERN, this.myDuality
+						.getPatterns(), this, x + row * 9, 8 + 18 * x, 97 + ( 18 * row ), row, this.getInventoryPlayer() ).setStackLimit( 1 ) );
+			}
 		}
 
 		for( int x = 0; x < DualityInterface.NUMBER_OF_CONFIG_SLOTS; x++ )
@@ -70,7 +76,7 @@ public class ContainerInterface extends ContainerUpgradeable
 	@Override
 	protected int getHeight()
 	{
-		return 211;
+		return 256;
 	}
 
 	@Override
@@ -82,16 +88,35 @@ public class ContainerInterface extends ContainerUpgradeable
 	@Override
 	public int availableUpgrades()
 	{
-		return 1;
+		return 4;
+	}
+
+	@Override
+	public boolean isSlotEnabled( final int idx )
+	{
+		return myDuality.getInstalledUpgrades(Upgrades.PATTERN_EXPANSION) >= idx;
 	}
 
 	@Override
 	public void detectAndSendChanges()
 	{
 		this.verifyPermissions( SecurityPermissions.BUILD, false );
+
+		if (patternExpansions != getPatternUpgrades())
+		{
+			patternExpansions = getPatternUpgrades();
+			this.myDuality.dropExcessPatterns();
+		}
 		super.detectAndSendChanges();
 	}
 
+	@Override
+	public void onUpdate( final String field, final Object oldValue, final Object newValue ) {
+		super.onUpdate(field, oldValue, newValue);
+		if ( Platform.isClient() && field.equals("patternExpansions"))
+			this.myDuality.dropExcessPatterns();
+	}
+
 	@Override
 	protected void loadSettingsFromHost( final IConfigManager cm )
 	{
@@ -118,4 +143,9 @@ public class ContainerInterface extends ContainerUpgradeable
 	{
 		this.iTermMode = iTermMode;
 	}
+
+	public int getPatternUpgrades()
+	{
+		return this.myDuality.getInstalledUpgrades( Upgrades.PATTERN_EXPANSION );
+	}
 }

src/main/java/appeng/container/implementations/ContainerInterfaceTerminal.java

@@ -24,6 +24,7 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.Map.Entry;
 
+import appeng.api.config.Upgrades;
 import net.minecraft.entity.player.EntityPlayerMP;
 import net.minecraft.entity.player.InventoryPlayer;
 import net.minecraft.item.ItemStack;
@@ -405,6 +406,7 @@ public final class ContainerInterfaceTerminal extends AEBaseContainer
 			tag.setString( "un", inv.unlocalizedName );
 			tag.setTag( "pos", NBTUtil.createPosTag( inv.pos ) );
 			tag.setInteger( "dim", inv.dim );
+			tag.setInteger( "numUpgrades", inv.numUpgrades );
 		}
 
 		for( int x = 0; x < length; x++ )
@@ -437,6 +439,7 @@ public final class ContainerInterfaceTerminal extends AEBaseContainer
 		private final IItemHandler server;
 		private final BlockPos pos;
 		private final int dim;
+		private final int numUpgrades;
 
 		public InvTracker( final DualityInterface dual, final IItemHandler patterns, final String unlocalizedName )
 		{
@@ -446,6 +449,7 @@ public final class ContainerInterfaceTerminal extends AEBaseContainer
 			this.sortBy = dual.getSortValue();
 			this.pos = dual.getLocation().getPos();
 			this.dim = dual.getLocation().getWorld().provider.getDimension();
+			this.numUpgrades = dual.getInstalledUpgrades( Upgrades.PATTERN_EXPANSION);
 		}
 	}
 

src/main/java/appeng/container/implementations/ContainerPatternTerm.java

@@ -134,14 +134,16 @@ public class ContainerPatternTerm extends ContainerMEMonitorable implements IAEA
 		{
 			return ItemStack.EMPTY;
 		}
-
-		final AppEngSlot clickSlot = ( AppEngSlot ) this.inventorySlots.get( idx ); // require AE SLots!
-		ItemStack itemStack = clickSlot.getStack();
-		if( AEApi.instance().definitions().materials().blankPattern().isSameAs( itemStack ) )
+		if( this.inventorySlots.get( idx ) instanceof SlotPlayerInv || this.inventorySlots.get( idx ) instanceof SlotPlayerHotBar )
 		{
-			IItemHandler patternInv = this.getPatternTerminal().getInventoryByName( "pattern" );
-			ItemStack remainder = patternInv.insertItem( 0, itemStack, false );
-			clickSlot.putStack( remainder );
+			final AppEngSlot clickSlot = ( AppEngSlot ) this.inventorySlots.get( idx ); // require AE SLots!
+			ItemStack itemStack = clickSlot.getStack();
+			if( AEApi.instance().definitions().materials().blankPattern().isSameAs( itemStack ) )
+			{
+				IItemHandler patternInv = this.getPatternTerminal().getInventoryByName( "pattern" );
+				ItemStack remainder = patternInv.insertItem( 0, itemStack, false );
+				clickSlot.putStack( remainder );
+			}
 		}
 		return super.transferStackInSlot( p, idx );
 	}

src/main/java/appeng/container/slot/AppEngSlot.java

@@ -157,7 +157,7 @@ public class AppEngSlot extends Slot
 	{
 		if( this.isSlotEnabled() )
 		{
-			return !this.itemHandler.extractItem( this.index, 1, true ).isEmpty();
+			return !this.itemHandler.extractItem( this.index, Integer.MAX_VALUE, true ).isEmpty();
 		}
 		return false;
 	}

src/main/java/appeng/core/Registration.java

@@ -363,6 +363,8 @@ final class Registration
 		// Interface
 		Upgrades.CRAFTING.registerItem( parts.iface(), 1 );
 		Upgrades.CRAFTING.registerItem( blocks.iface(), 1 );
+		Upgrades.PATTERN_EXPANSION.registerItem( parts.iface(), 3 );
+		Upgrades.PATTERN_EXPANSION.registerItem( blocks.iface(), 3 );
 
 		// IO Port!
 		Upgrades.SPEED.registerItem( blocks.iOPort(), 3 );

src/main/java/appeng/core/api/ApiStorage.java

@@ -175,7 +175,7 @@ public class ApiStorage implements IStorageHelper
 		@Override
 		public int transferFactor()
 		{
-			return 125;
+			return 1000;
 		}
 
 		@Override

src/main/java/appeng/core/api/definitions/ApiMaterials.java

@@ -86,6 +86,7 @@ public final class ApiMaterials implements IMaterials
 	private final IItemDefinition cardRedstone;
 	private final IItemDefinition cardSpeed;
 	private final IItemDefinition cardCapacity;
+	private final IItemDefinition cardPatternExpansion;
 	private final IItemDefinition cardFuzzy;
 	private final IItemDefinition cardInverter;
 	private final IItemDefinition cardCrafting;
@@ -204,6 +205,7 @@ public final class ApiMaterials implements IMaterials
 		this.cardRedstone = new DamagedItemDefinition( "material.card.redstone", materials.createMaterial( MaterialType.CARD_REDSTONE ) );
 		this.cardSpeed = new DamagedItemDefinition( "material.card.acceleration", materials.createMaterial( MaterialType.CARD_SPEED ) );
 		this.cardCapacity = new DamagedItemDefinition( "material.card.capacity", materials.createMaterial( MaterialType.CARD_CAPACITY ) );
+		this.cardPatternExpansion = new DamagedItemDefinition( "material.card.pattern.expansion", materials.createMaterial(MaterialType.CARD_PATTERN_EXPANSION) );
 		this.cardFuzzy = new DamagedItemDefinition( "material.card.fuzzy", materials.createMaterial( MaterialType.CARD_FUZZY ) );
 		this.cardInverter = new DamagedItemDefinition( "material.card.inverter", materials.createMaterial( MaterialType.CARD_INVERTER ) );
 		this.cardCrafting = new DamagedItemDefinition( "material.card.crafting", materials.createMaterial( MaterialType.CARD_CRAFTING ) );
@@ -424,6 +426,9 @@ public final class ApiMaterials implements IMaterials
 		return this.cardCapacity;
 	}
 
+	@Override
+	public IItemDefinition cardPatternExpansion(){ return this.cardPatternExpansion;}
+
 	@Override
 	public IItemDefinition cardFuzzy()
 	{

src/main/java/appeng/core/sync/packets/PacketJEIRecipe.java

@@ -29,6 +29,7 @@ import java.util.Iterator;
 import appeng.api.config.FuzzyMode;
 import appeng.api.storage.data.IItemList;
 import appeng.container.implementations.ContainerPatternTerm;
+import gregtech.common.items.MetaTool;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 
@@ -211,23 +212,21 @@ public class PacketJEIRecipe extends AppEngPacket
 									out = Platform.poweredExtraction( energy, storage, request, cct.getActionSource() );
 									if( out == null )
 									{
-										Collection<IAEItemStack> outList = inv.getInventory( AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ) ).getStorageList().findFuzzy( request, FuzzyMode.IGNORE_ALL );
-										IAEItemStack mostDamaged = null;
-										for( IAEItemStack is : outList )
+										if( request.getItem().isDamageable() || ( Platform.isModLoaded( "gregtech" ) && request.getItem() instanceof MetaTool ) )
 										{
-											if( !is.isCraftable() )
+											Collection<IAEItemStack> outList = inv.getInventory( AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ) ).getStorageList().findFuzzy( request, FuzzyMode.IGNORE_ALL );
+											for( IAEItemStack is : outList )
 											{
-												if( mostDamaged == null || mostDamaged.getItemDamage() < is.getItemDamage() )
+												if( is.getDefinition().getMetadata() == request.getDefinition().getMetadata() )
 												{
-													mostDamaged = is;
+													out = Platform.poweredExtraction( energy, storage, is.copy().setStackSize( 1 ), cct.getActionSource() );
+												}
+												if( out != null )
+												{
+													break;
 												}
 											}
 										}
-										if( mostDamaged != null )
-										{
-											mostDamaged.setStackSize( 1 );
-											out = Platform.poweredExtraction( energy, storage, mostDamaged, cct.getActionSource() );
-										}
 									}
 								}
 								else

src/main/java/appeng/crafting/CraftingTreeNode.java

@@ -130,7 +130,12 @@ public class CraftingTreeNode
 
 			if( this.parent.details.canSubstitute() )
 			{
-				itemList = inventoryList.findFuzzy( this.what, FuzzyMode.IGNORE_ALL );
+				final List<IAEItemStack> substitutes = this.parent.details.getSubstituteInputs(this.slot);
+				itemList = new ArrayList<>(substitutes.size());
+
+				for (IAEItemStack stack : substitutes) {
+					itemList.addAll(inventoryList.findFuzzy(stack, FuzzyMode.IGNORE_ALL));
+				}
 			}
 			else
 			{

src/main/java/appeng/crafting/CraftingTreeProcess.java

@@ -305,7 +305,7 @@ public class CraftingTreeProcess
 
 	void getPlan( final IItemList<IAEItemStack> plan )
 	{
-		for( IAEItemStack i : this.details.getOutputs() )
+		for( IAEItemStack i : this.details.getCondensedOutputs() )
 		{
 			i = i.copy();
 			i.setCountRequestable( i.getStackSize() * this.crafts );

src/main/java/appeng/crafting/MECraftingInventory.java

@@ -28,7 +28,9 @@ import appeng.api.storage.IStorageChannel;
 import appeng.api.storage.channels.IItemStorageChannel;
 import appeng.api.storage.data.IAEItemStack;
 import appeng.api.storage.data.IItemList;
+import appeng.me.helpers.PlayerSource;
 import appeng.util.inv.ItemListIgnoreCrafting;
+import net.minecraft.util.text.TextComponentString;
 
 
 public class MECraftingInventory implements IMEInventory<IAEItemStack>
@@ -307,8 +309,15 @@ public class MECraftingInventory implements IMEInventory<IAEItemStack>
 
 				if( result == null || result.getStackSize() != extra.getStackSize() )
 				{
+					if( src.player().isPresent() )
+					{
+						if( result == null )
+							src.player().get().sendStatusMessage( new TextComponentString( "System reported " + extra.getStackSize() + " " + extra.getDefinition().getDisplayName() + " available but could not extract anything" ), false );
+						else
+							src.player().get().sendStatusMessage( new TextComponentString( "System reported " + extra.getStackSize() + " " + extra.getDefinition().getDisplayName() + " available but could only extract " + result.getStackSize() ), false );
+					}
 					failed = true;
-					break;
+					if( !src.player().isPresent() ) break;
 				}
 			}
 		}

src/main/java/appeng/fluids/container/ContainerFluidTerminal.java

@@ -24,6 +24,9 @@ import java.nio.BufferOverflowException;
 
 import javax.annotation.Nonnull;
 
+import appeng.container.slot.AppEngSlot;
+import appeng.container.slot.SlotPlayerHotBar;
+import appeng.container.slot.SlotPlayerInv;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.entity.player.EntityPlayerMP;
 import net.minecraft.entity.player.InventoryPlayer;
@@ -70,6 +73,7 @@ import appeng.me.helpers.ChannelPowerSrc;
 import appeng.util.ConfigManager;
 import appeng.util.IConfigManagerHost;
 import appeng.util.Platform;
+import net.minecraftforge.items.IItemHandler;
 
 
 /**
@@ -342,6 +346,89 @@ public class ContainerFluidTerminal extends AEBaseContainer implements IConfigMa
 		}
 	}
 
+	@Override
+	public ItemStack transferStackInSlot( final EntityPlayer p, final int idx )
+	{
+		if( Platform.isClient() )
+		{
+			return ItemStack.EMPTY;
+		}
+		EntityPlayerMP player = (EntityPlayerMP) p;
+		if( this.inventorySlots.get( idx ) instanceof SlotPlayerInv || this.inventorySlots.get( idx ) instanceof SlotPlayerHotBar )
+		{
+			final AppEngSlot clickSlot = (AppEngSlot) this.inventorySlots.get( idx ); // require AE SLots!
+			ItemStack itemStack = clickSlot.getStack();
+
+			ItemStack copy = itemStack.copy();
+			copy.setCount( 1 );
+			IFluidHandlerItem fh = FluidUtil.getFluidHandler( copy );
+			if( fh == null )
+			{
+				// only fluid handlers items
+				return ItemStack.EMPTY;
+			}
+
+			int heldAmount = itemStack.getCount();
+			for( int i = 0; i < heldAmount; i++ )
+			{
+				copy = itemStack.copy();
+				copy.setCount( 1 );
+				fh = FluidUtil.getFluidHandler( copy );
+
+				final FluidStack extract = fh.drain( Integer.MAX_VALUE, false );
+				if( extract == null || extract.amount < 1 )
+				{
+					return ItemStack.EMPTY;
+				}
+
+				// Check if we can push into the system
+				final IAEFluidStack notStorable = Platform.poweredInsert( this.getPowerSource(), this.monitor, AEFluidStack.fromFluidStack( extract ), this.getActionSource(), Actionable.SIMULATE );
+
+				if( notStorable != null && notStorable.getStackSize() > 0 )
+				{
+					final int toStore = (int) ( extract.amount - notStorable.getStackSize() );
+					final FluidStack storable = fh.drain( toStore, false );
+
+					if( storable == null || storable.amount == 0 )
+					{
+						return ItemStack.EMPTY;
+					}
+					else
+					{
+						extract.amount = storable.amount;
+					}
+				}
+
+				// Actually drain
+				final FluidStack drained = fh.drain( extract, true );
+				extract.amount = drained.amount;
+
+				final IAEFluidStack notInserted = Platform.poweredInsert( this.getPowerSource(), this.monitor, AEFluidStack.fromFluidStack( extract ), this.getActionSource() );
+
+				if( notInserted != null && notInserted.getStackSize() > 0 )
+				{
+					IAEFluidStack spill = this.monitor.injectItems( notInserted, Actionable.MODULATE, this.getActionSource() );
+					if( spill != null && spill.getStackSize() > 0 )
+					{
+						fh.fill( spill.getFluidStack(), true );
+					}
+				}
+
+				if( notInserted == null )
+				{
+					if( !player.inventory.addItemStackToInventory( fh.getContainer() ) )
+					{
+						player.dropItem( fh.getContainer(), false );
+					}
+					clickSlot.decrStackSize( 1 );
+				}
+			}
+			this.detectAndSendChanges();
+			return ItemStack.EMPTY;
+		}
+		return super.transferStackInSlot( p, idx );
+	}
+
 	@Override
 	public void doAction( EntityPlayerMP player, InventoryAction action, int slot, long id )
 	{
@@ -352,13 +439,9 @@ public class ContainerFluidTerminal extends AEBaseContainer implements IConfigMa
 		}
 
 		final ItemStack held = player.inventory.getItemStack();
-		if( held.getCount() != 1 )
-		{
-			// only support stacksize 1 for now
-			return;
-		}
-
-		final IFluidHandlerItem fh = FluidUtil.getFluidHandler( held );
+		ItemStack heldCopy = held.copy();
+		heldCopy.setCount( 1 );
+		IFluidHandlerItem fh = FluidUtil.getFluidHandler( heldCopy );
 		if( fh == null )
 		{
 			// only fluid handlers items
@@ -372,84 +455,122 @@ public class ContainerFluidTerminal extends AEBaseContainer implements IConfigMa
 			// Check how much we can store in the item
 			stack.setStackSize( Integer.MAX_VALUE );
 			int amountAllowed = fh.fill( stack.getFluidStack(), false );
-			stack.setStackSize( amountAllowed );
-
-			// Check if we can pull out of the system
-			final IAEFluidStack canPull = Platform.poweredExtraction( this.getPowerSource(), this.monitor, stack, this.getActionSource(), Actionable.SIMULATE );
-			if( canPull == null || canPull.getStackSize() < 1 )
+			int heldAmount = held.getCount();
+			for( int i = 0; i < heldAmount; i++ )
 			{
-				return;
-			}
+				ItemStack copiedFluidContainer = held.copy();
+				copiedFluidContainer.setCount( 1 );
+				fh = FluidUtil.getFluidHandler( copiedFluidContainer );
 
-			// How much could fit into the container
-			final int canFill = fh.fill( canPull.getFluidStack(), false );
-			if( canFill == 0 )
-			{
-				return;
-			}
-
-			// Now actually pull out of the system
-			stack.setStackSize( canFill );
-			final IAEFluidStack pulled = Platform.poweredExtraction( this.getPowerSource(), this.monitor, stack, this.getActionSource() );
-			if( pulled == null || pulled.getStackSize() < 1 )
-			{
-				// Something went wrong
-				AELog.error( "Unable to pull fluid out of the ME system even though the simulation said yes " );
-				return;
-			}
-
-			// Actually fill
-			final int used = fh.fill( pulled.getFluidStack(), true );
-
-			if( used != canFill )
-			{
-				AELog.error( "Fluid item [%s] reported a different possible amount than it actually accepted.", held.getDisplayName() );
-			}
-
-			player.inventory.setItemStack( fh.getContainer() );
-			this.updateHeld( player );
-		}
-		else if( action == InventoryAction.EMPTY_ITEM )
-		{
-			// See how much we can drain from the item
-			final FluidStack extract = fh.drain( Integer.MAX_VALUE, false );
-			if( extract == null || extract.amount < 1 )
-			{
-				return;
-			}
-
-			// Check if we can push into the system
-			final IAEFluidStack notStorable = Platform.poweredInsert( this.getPowerSource(), this.monitor, AEFluidStack.fromFluidStack( extract ),
-					this.getActionSource(), Actionable.SIMULATE );
-
-			if( notStorable != null && notStorable.getStackSize() > 0 )
-			{
-				final int toStore = (int) ( extract.amount - notStorable.getStackSize() );
-				final FluidStack storable = fh.drain( toStore, false );
-
-				if( storable == null || storable.amount == 0 )
+				// Check if we can pull out of the system
+				final IAEFluidStack canPull = Platform.poweredExtraction( this.getPowerSource(), this.monitor, stack.setStackSize( amountAllowed ), this.getActionSource(), Actionable.SIMULATE );
+				if( canPull == null || canPull.getStackSize() < 1 )
 				{
 					return;
 				}
+
+				// How much could fit into the container
+				final int canFill = fh.fill( canPull.getFluidStack(), false );
+				if( canFill == 0 )
+				{
+					return;
+				}
+
+				// Now actually pull out of the system
+				final IAEFluidStack pulled = Platform.poweredExtraction( this.getPowerSource(), this.monitor, stack.setStackSize( canFill ), this.getActionSource() );
+				if( pulled == null || pulled.getStackSize() < 1 )
+				{
+					// Something went wrong
+					AELog.error( "Unable to pull fluid out of the ME system even though the simulation said yes " );
+					return;
+				}
+
+				// Actually fill
+				final int used = fh.fill( pulled.getFluidStack(), true );
+
+				if( used != canFill )
+				{
+					AELog.error( "Fluid item [%s] reported a different possible amount than it actually accepted.", held.getDisplayName() );
+				}
+
+				if( held.getCount() == 1 )
+				{
+					player.inventory.setItemStack( fh.getContainer() );
+				}
 				else
 				{
-					extract.amount = storable.amount;
+					player.inventory.getItemStack().shrink( 1 );
+					if( !player.inventory.addItemStackToInventory( fh.getContainer() ) )
+					{
+						player.dropItem( fh.getContainer(), false );
+					}
 				}
 			}
+			this.updateHeld( player );
 
-			// Actually drain
-			final FluidStack drained = fh.drain( extract, true );
-			extract.amount = drained.amount;
-
-			final IAEFluidStack notInserted = Platform.poweredInsert( this.getPowerSource(), this.monitor, AEFluidStack.fromFluidStack( extract ),
-					this.getActionSource() );
-
-			if( notInserted != null && notInserted.getStackSize() > 0 )
+		}
+		else if( action == InventoryAction.EMPTY_ITEM )
+		{
+			int heldAmount = held.getCount();
+			for( int i = 0; i < heldAmount; i++ )
 			{
-				AELog.error( "Fluid item [%s] reported a different possible amount to drain than it actually provided.", held.getDisplayName() );
-			}
+				ItemStack copiedFluidContainer = held.copy();
+				copiedFluidContainer.setCount( 1 );
+				fh = FluidUtil.getFluidHandler( copiedFluidContainer );
 
-			player.inventory.setItemStack( fh.getContainer() );
+				// See how much we can drain from the item
+				final FluidStack extract = fh.drain( Integer.MAX_VALUE, false );
+				if( extract == null || extract.amount < 1 )
+				{
+					return;
+				}
+
+				// Check if we can push into the system
+				final IAEFluidStack notStorable = Platform.poweredInsert( this.getPowerSource(), this.monitor, AEFluidStack.fromFluidStack( extract ), this.getActionSource(), Actionable.SIMULATE );
+
+				if( notStorable != null && notStorable.getStackSize() > 0 )
+				{
+					final int toStore = (int) ( extract.amount - notStorable.getStackSize() );
+					final FluidStack storable = fh.drain( toStore, false );
+
+					if( storable == null || storable.amount == 0 )
+					{
+						return;
+					}
+					else
+					{
+						extract.amount = storable.amount;
+					}
+				}
+
+				// Actually drain
+				final FluidStack drained = fh.drain( extract, true );
+				extract.amount = drained.amount;
+
+				final IAEFluidStack notInserted = Platform.poweredInsert( this.getPowerSource(), this.monitor, AEFluidStack.fromFluidStack( extract ), this.getActionSource() );
+
+				if( notInserted != null && notInserted.getStackSize() > 0 )
+				{
+					IAEFluidStack spill = this.monitor.injectItems( notInserted, Actionable.MODULATE, this.getActionSource() );
+					if( spill != null && spill.getStackSize() > 0 )
+					{
+						fh.fill( spill.getFluidStack(), true );
+					}
+				}
+
+				if( held.getCount() == 1 )
+				{
+					player.inventory.setItemStack( fh.getContainer() );
+				}
+				else
+				{
+					player.inventory.getItemStack().shrink( 1 );
+					if( !player.inventory.addItemStackToInventory( fh.getContainer() ) )
+					{
+						player.dropItem( fh.getContainer(), false );
+					}
+				}
+			}
 			this.updateHeld( player );
 		}
 	}

src/main/java/appeng/fluids/parts/FluidHandlerAdapter.java

@@ -20,7 +20,6 @@ package appeng.fluids.parts;
 
 
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
@@ -45,7 +44,6 @@ import appeng.api.storage.channels.IFluidStorageChannel;
 import appeng.api.storage.data.IAEFluidStack;
 import appeng.api.storage.data.IItemList;
 import appeng.fluids.util.AEFluidStack;
-import appeng.me.GridAccessException;
 import appeng.me.helpers.IGridProxyable;
 import appeng.me.storage.ITickingMonitor;
 
@@ -94,14 +92,9 @@ public class FluidHandlerAdapter implements IMEInventory<IAEFluidStack>, IBaseMo
 
 		if( type == Actionable.MODULATE )
 		{
-			try
-			{
-				this.proxyable.getProxy().getTick().alertDevice( this.proxyable.getProxy().getNode() );
-			}
-			catch( GridAccessException ignore )
-			{
-				// meh
-			}
+			this.cache
+					.currentlyCached
+					.add( input.copy().setStackSize( wasFillled ));
 		}
 
 		fluidStack.amount = remaining;
@@ -123,18 +116,16 @@ public class FluidHandlerAdapter implements IMEInventory<IAEFluidStack>, IBaseMo
 			return null;
 		}
 
+		IAEFluidStack gatheredAEFluidstack = AEFluidStack.fromFluidStack( gathered );
 		if( mode == Actionable.MODULATE )
 		{
-			try
+			IAEFluidStack e = this.cache.currentlyCached.findPrecise( gatheredAEFluidstack );
+			if (e != null)
 			{
-				this.proxyable.getProxy().getTick().alertDevice( this.proxyable.getProxy().getNode() );
-			}
-			catch( GridAccessException ignore )
-			{
-				// meh
+				e.decStackSize( gathered.amount );
 			}
 		}
-		return AEFluidStack.fromFluidStack( gathered );
+		return gatheredAEFluidstack;
 	}
 
 	@Override
@@ -202,9 +193,10 @@ public class FluidHandlerAdapter implements IMEInventory<IAEFluidStack>, IBaseMo
 
 	private static class InventoryCache
 	{
-		private IAEFluidStack[] cachedAeStacks = new IAEFluidStack[0];
 		private final IFluidHandler fluidHandler;
 		private final StorageFilter mode;
+		IItemList<IAEFluidStack> currentlyCached = AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ).createList();
+
 
 		public InventoryCache( IFluidHandler fluidHandler, StorageFilter mode )
 		{
@@ -216,19 +208,12 @@ public class FluidHandlerAdapter implements IMEInventory<IAEFluidStack>, IBaseMo
 		{
 			final List<IAEFluidStack> changes = new ArrayList<>();
 			final IFluidTankProperties[] tankProperties = this.fluidHandler.getTankProperties();
-			final int slots = tankProperties.length;
 
-			// Make room for new slots
-			if( slots > this.cachedAeStacks.length )
-			{
-				this.cachedAeStacks = Arrays.copyOf( this.cachedAeStacks, slots );
-			}
+			IItemList<IAEFluidStack> currentlyOnStorage = AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ).createList();
 
-			for( int slot = 0; slot < slots; slot++ )
+			for( IFluidTankProperties tankProperty : tankProperties )
 			{
-				// Save the old stuff
-				final IAEFluidStack oldAEFS = this.cachedAeStacks[slot];
-				FluidStack newFS = tankProperties[slot].getContents();
+				FluidStack newFS = tankProperty.getContents();
 				if( this.mode == StorageFilter.EXTRACTABLE_ONLY && newFS != null )
 				{
 					if( this.fluidHandler.drain( 1, false ) == null )
@@ -236,82 +221,40 @@ public class FluidHandlerAdapter implements IMEInventory<IAEFluidStack>, IBaseMo
 						newFS = null;
 					}
 				}
-				this.handlePossibleSlotChanges( slot, oldAEFS, newFS, changes );
-			}
-
-			// Handle cases where the number of slots actually is lower now than before
-			if( slots < this.cachedAeStacks.length )
-			{
-				for( int slot = slots; slot < this.cachedAeStacks.length; slot++ )
+				if( newFS != null )
 				{
-					final IAEFluidStack aeStack = this.cachedAeStacks[slot];
-
-					if( aeStack != null )
-					{
-						final IAEFluidStack a = aeStack.copy();
-						a.setStackSize( -a.getStackSize() );
-						changes.add( a );
-					}
+					currentlyOnStorage.add( AEFluidStack.fromFluidStack( newFS ) );
 				}
-
-				this.cachedAeStacks = Arrays.copyOf( this.cachedAeStacks, slots );
 			}
+
+			for ( final IAEFluidStack is : currentlyCached )
+			{
+				is.setStackSize( -is.getStackSize() );
+			}
+
+			for ( final IAEFluidStack is : currentlyOnStorage )
+			{
+				currentlyCached.add( is );
+			}
+
+			for ( final IAEFluidStack is : currentlyCached )
+			{
+				if( is.getStackSize() != 0 )
+				{
+					changes.add( is );
+				}
+			}
+
+			currentlyCached = currentlyOnStorage;
+
 			return changes;
 		}
 
 		public IItemList<IAEFluidStack> getAvailableItems( IItemList<IAEFluidStack> out )
 		{
-			Arrays.stream( this.cachedAeStacks ).forEach( out::add );
+			currentlyCached.iterator().forEachRemaining( out::add );
 			return out;
 		}
 
-		private void handlePossibleSlotChanges( int slot, IAEFluidStack oldAeFS, FluidStack newFS, List<IAEFluidStack> changes )
-		{
-			if( oldAeFS != null && oldAeFS.getFluidStack().isFluidEqual( newFS ) )
-			{
-				this.handleStackSizeChanged( slot, oldAeFS, newFS, changes );
-			}
-			else
-			{
-				this.handleFluidChanged( slot, oldAeFS, newFS, changes );
-			}
-		}
-
-		private void handleStackSizeChanged( int slot, IAEFluidStack oldAeFS, FluidStack newFS, List<IAEFluidStack> changes )
-		{
-			// Still the same fluid, but amount might have changed
-			final long diff = newFS.amount - oldAeFS.getStackSize();
-
-			if( diff != 0 )
-			{
-				final IAEFluidStack stack = oldAeFS.copy();
-				stack.setStackSize( newFS.amount );
-
-				this.cachedAeStacks[slot] = stack;
-
-				final IAEFluidStack a = stack.copy();
-				a.setStackSize( diff );
-				changes.add( a );
-			}
-		}
-
-		private void handleFluidChanged( int slot, IAEFluidStack oldAeFS, FluidStack newFS, List<IAEFluidStack> changes )
-		{
-			// Completely different fluid
-			this.cachedAeStacks[slot] = AEFluidStack.fromFluidStack( newFS );
-
-			// If we had a stack previously in this slot, notify the network about its disappearance
-			if( oldAeFS != null )
-			{
-				oldAeFS.setStackSize( -oldAeFS.getStackSize() );
-				changes.add( oldAeFS );
-			}
-
-			// Notify the network about the new stack. Note that this is null if newFS was null
-			if( this.cachedAeStacks[slot] != null )
-			{
-				changes.add( this.cachedAeStacks[slot] );
-			}
-		}
 	}
 }

src/main/java/appeng/fluids/parts/PartFluidLevelEmitter.java

@@ -4,7 +4,9 @@ package appeng.fluids.parts;
 
 import java.util.Random;
 
+import appeng.api.networking.events.MENetworkChannelChanged;
 import appeng.fluids.helper.IConfigurableFluidInventory;
+import appeng.me.cache.NetworkMonitor;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NBTTagCompound;
@@ -34,7 +36,6 @@ import appeng.api.storage.IStorageChannel;
 import appeng.api.storage.channels.IFluidStorageChannel;
 import appeng.api.storage.data.IAEFluidStack;
 import appeng.api.storage.data.IAEStack;
-import appeng.api.storage.data.IItemList;
 import appeng.api.util.AECableType;
 import appeng.api.util.AEPartLocation;
 import appeng.api.util.IConfigManager;
@@ -112,11 +113,11 @@ public class PartFluidLevelEmitter extends PartUpgradeable implements IStackWatc
 	}
 
 	@Override
-	public void onStackChange( IItemList<?> o, IAEStack<?> fullStack, IAEStack<?> diffStack, IActionSource src, IStorageChannel<?> chan )
+	public void onStackChange( IAEStack<?> diffStack, IStorageChannel<?> chan )
 	{
-		if( chan == AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ) && fullStack.equals( this.config.getFluidInSlot( 0 ) ) )
+		if( chan == AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ) && diffStack.equals( this.config.getFluidInSlot( 0 ) ) )
 		{
-			this.lastReportedValue = fullStack.getStackSize();
+			this.lastReportedValue += diffStack.getStackSize();
 			this.updateState();
 		}
 	}
@@ -128,14 +129,22 @@ public class PartFluidLevelEmitter extends PartUpgradeable implements IStackWatc
 	}
 
 	@MENetworkEventSubscribe
-	public void channelChanged( final MENetworkChannelsChanged c )
+	public void powerStatusChange( final MENetworkPowerStatusChange powerEvent )
 	{
+		if (this.getProxy().isActive())
+		{
+			onListUpdate();
+		}
 		this.updateState();
 	}
 
 	@MENetworkEventSubscribe
-	public void powerChanged( final MENetworkPowerStatusChange c )
+	public void channelChanged( final MENetworkChannelsChanged c )
 	{
+		if (this.getProxy().isActive())
+		{
+			onListUpdate();
+		}
 		this.updateState();
 	}
 
@@ -247,10 +256,9 @@ public class PartFluidLevelEmitter extends PartUpgradeable implements IStackWatc
 
 		if( myStack == null )
 		{
-			this.lastReportedValue = 0;
-			for( final IAEFluidStack st : monitor.getStorageList() )
+			if( monitor instanceof NetworkMonitor )
 			{
-				this.lastReportedValue += st.getStackSize();
+				this.lastReportedValue = ( (NetworkMonitor<IAEFluidStack>) monitor ).getGridCurrentCount();
 			}
 		}
 		else

src/main/java/appeng/fluids/parts/PartFluidStorageBus.java

@@ -264,20 +264,17 @@ public class PartFluidStorageBus extends PartSharedStorageBus implements IMEMoni
 	@Override
 	public void postChange( final IBaseMonitor<IAEFluidStack> monitor, final Iterable<IAEFluidStack> change, final IActionSource source )
 	{
-		if( source == this.source || source.machine().map( machine -> machine == this ).orElse( false ) )
+		try
 		{
-			try
+			if( this.getProxy().isActive() )
 			{
-				if( this.getProxy().isActive() )
-				{
-					this.getProxy().getStorage().postAlterationOfStoredItems( AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ), change, this.source );
-				}
-			}
-			catch( final GridAccessException e )
-			{
-				// :(
+				this.getProxy().getStorage().postAlterationOfStoredItems( AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ), change, this.source );
 			}
 		}
+		catch( final GridAccessException e )
+		{
+			// :(
+		}
 	}
 
 	public MEInventoryHandler<IAEFluidStack> getInternalHandler()
@@ -415,7 +412,7 @@ public class PartFluidStorageBus extends PartSharedStorageBus implements IMEMoni
 	{
 		if( channel == this.getStorageChannel() )
 		{
-			final IMEInventoryHandler<IAEFluidStack> out = this.getProxy().isActive() ? this.getInternalHandler() : null;
+			final IMEInventoryHandler<IAEFluidStack> out = this.getInternalHandler();
 			if( out != null )
 			{
 				return Collections.singletonList( out );

src/main/java/appeng/helpers/DualityInterface.java

@@ -20,10 +20,10 @@ package appeng.helpers;
 
 
 import java.util.*;
-import java.util.stream.Collectors;
 
 import javax.annotation.Nullable;
 
+import appeng.api.definitions.IItemDefinition;
 import appeng.integration.modules.gregtech.GTCEInventoryAdaptor;
 import appeng.util.*;
 import appeng.util.inv.*;
@@ -33,10 +33,9 @@ import de.ellpeck.actuallyadditions.api.tile.IPhantomTile;
 import gregtech.api.block.machines.BlockMachine;
 import gregtech.api.metatileentity.MetaTileEntity;
 import gregtech.api.metatileentity.MetaTileEntityHolder;
-import gregtech.api.metatileentity.TieredMetaTileEntity;
-import gregtech.api.metatileentity.WorkableTieredMetaTileEntity;
 import net.minecraft.block.Block;
 import net.minecraft.block.state.IBlockState;
+import net.minecraft.client.Minecraft;
 import net.minecraft.init.Items;
 import net.minecraft.inventory.InventoryCrafting;
 import net.minecraft.item.Item;
@@ -115,7 +114,7 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 
 	public static final int NUMBER_OF_STORAGE_SLOTS = 9;
 	public static final int NUMBER_OF_CONFIG_SLOTS = 9;
-	public static final int NUMBER_OF_PATTERN_SLOTS = 9;
+	public static final int NUMBER_OF_PATTERN_SLOTS = 36;
 
 	private static final Collection<Block> BAD_BLOCKS = new HashSet<>( 100 );
 	private final IAEItemStack[] requireWork = { null, null, null, null, null, null, null, null, null };
@@ -151,7 +150,7 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 		this.gridProxy = networkProxy;
 		this.gridProxy.setFlags( GridFlags.REQUIRE_CHANNEL );
 
-		this.upgrades = new StackUpgradeInventory( this.gridProxy.getMachineRepresentation(), this, 1 );
+		this.upgrades = new StackUpgradeInventory( this.gridProxy.getMachineRepresentation(), this, 4);
 		this.cm.registerSetting( Settings.BLOCK, YesNo.NO );
 		this.cm.registerSetting( Settings.INTERFACE_TERMINAL, YesNo.YES );
 
@@ -179,7 +178,6 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 		{
 			return;
 		}
-
 		if( inv == this.config )
 		{
 			this.readConfig();
@@ -279,10 +277,11 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 		}
 
 		this.waitingToSendFacing = null;
-		final NBTTagCompound waitingListSided = data.getCompoundTag("sidedWaitList");
+		final NBTTagCompound waitingListSided = data.getCompoundTag( "sidedWaitList" );
 
-		for (EnumFacing s : EnumFacing.values())
-			if (waitingListSided.hasKey( s.name() )) {
+		for( EnumFacing s : EnumFacing.values() )
+			if( waitingListSided.hasKey( s.name() ) )
+			{
 				NBTTagList w = waitingListSided.getTagList( s.name(), 10 );
 				for( int x = 0; x < w.tagCount(); x++ )
 				{
@@ -290,14 +289,31 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 					if( c != null )
 					{
 						final ItemStack is = new ItemStack( c );
-						this.addToSendListFacing( is , EnumFacing.getFront( s.getIndex() ) );
+						this.addToSendListFacing( is, EnumFacing.getFront( s.getIndex() ) );
 					}
 				}
 			}
 
 		this.craftingTracker.readFromNBT( data );
+
+		// fix upgrade slot size mismatch
+		NBTTagCompound up = data.getCompoundTag( "upgrades" );
+		if( up.hasKey( "Size" ) && up.getInteger( "Size" ) != this.upgrades.getSlots() )
+		{
+			up.setInteger( "Size", this.upgrades.getSlots() );
+			this.upgrades.writeToNBT( up, "upgrades" );
+		}
+
 		this.upgrades.readFromNBT( data, "upgrades" );
 		this.config.readFromNBT( data, "config" );
+
+		NBTTagCompound pa = data.getCompoundTag( "patterns" );
+		if( pa.hasKey( "Size" ) && pa.getInteger( "Size" ) != this.patterns.getSlots() )
+		{
+			pa.setInteger( "Size", this.patterns.getSlots() );
+			this.upgrades.writeToNBT( pa, "patterns" );
+		}
+
 		this.patterns.readFromNBT( data, "patterns" );
 		this.storage.readFromNBT( data, "storage" );
 		this.priority = data.getInteger( "priority" );
@@ -400,9 +416,8 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 
 	private void updateCraftingList()
 	{
-		final Boolean[] accountedFor = { false, false, false, false, false, false, false, false, false }; // 9...
-
-		assert ( accountedFor.length == this.patterns.getSlots() );
+		final Boolean[] accountedFor = new Boolean[this.patterns.getSlots()];
+		Arrays.fill( accountedFor, false );
 
 		if( !this.gridProxy.isReady() )
 		{
@@ -417,7 +432,7 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 				final ICraftingPatternDetails details = i.next();
 				boolean found = false;
 
-				for( int x = 0; x < accountedFor.length; x++ )
+				for( int x = 0; x < accountedFor.length ; x++ )
 				{
 					final ItemStack is = this.patterns.getStackInSlot( x );
 					if( details.getPattern() == is )
@@ -433,7 +448,7 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 			}
 		}
 
-		for( int x = 0; x < accountedFor.length; x++ )
+		for( int x = 0; x < accountedFor.length ; x++ )
 		{
 			if( !accountedFor[x] )
 			{
@@ -586,6 +601,30 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 		return false;
 	}
 
+	public void dropExcessPatterns()
+	{
+		IItemHandler patterns = getPatterns();
+
+		List<ItemStack> dropList = new ArrayList<>();
+		for( int invSlot = 0; invSlot < patterns.getSlots(); invSlot++ )
+		{
+			if( invSlot > 8 +  this.getInstalledUpgrades( Upgrades.PATTERN_EXPANSION ) * 9 )
+			{
+				ItemStack is = patterns.getStackInSlot( invSlot );
+				if( is.isEmpty() ) continue;
+				dropList.add( patterns.extractItem( invSlot, Integer.MAX_VALUE, false ) );
+			}
+		}
+		if( dropList.size() > 0 )
+		{
+			World world = this.getLocation().getWorld();
+			BlockPos blockPos = this.getLocation().getPos();
+			Platform.spawnDrops( world, blockPos, dropList );
+		}
+
+		this.gridProxy.setIdlePowerUsage( Math.pow( 4, ( this.getInstalledUpgrades( Upgrades.PATTERN_EXPANSION ) ) ) );
+	}
+
 	@Override
 	public boolean canInsert( final ItemStack stack )
 	{

src/main/java/appeng/helpers/PatternHelper.java

@@ -19,21 +19,18 @@
 package appeng.helpers;
 
 
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.StringJoiner;
+import java.util.*;
+import java.util.stream.Collectors;
 
 import net.minecraft.inventory.InventoryCrafting;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
 import net.minecraft.item.crafting.CraftingManager;
 import net.minecraft.item.crafting.IRecipe;
+import net.minecraft.item.crafting.Ingredient;
 import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.nbt.NBTTagList;
+import net.minecraft.util.NonNullList;
 import net.minecraft.world.World;
 
 import appeng.api.AEApi;
@@ -46,11 +43,17 @@ import appeng.core.AELog;
 import appeng.core.features.AEFeature;
 import appeng.util.Platform;
 import appeng.util.item.AEItemStack;
+import net.minecraftforge.common.crafting.IShapedRecipe;
 
 
 public class PatternHelper implements ICraftingPatternDetails, Comparable<PatternHelper>
 {
 
+	private static final int CRAFTING_GRID_DIMENSION = 3;
+	private static final int ALL_INPUT_LIMIT = CRAFTING_GRID_DIMENSION * CRAFTING_GRID_DIMENSION;
+	private static final int CRAFTING_OUTPUT_LIMIT = 1;
+	private static final int PROCESSING_OUTPUT_LIMIT = 3;
+
 	private final ItemStack patternItem;
 	private final InventoryCrafting crafting = new InventoryCrafting( new ContainerNull(), 3, 3 );
 	private final InventoryCrafting testFrame = new InventoryCrafting( new ContainerNull(), 3, 3 );
@@ -60,6 +63,7 @@ public class PatternHelper implements ICraftingPatternDetails, Comparable<Patter
 	private final IAEItemStack[] condensedOutputs;
 	private final IAEItemStack[] inputs;
 	private final IAEItemStack[] outputs;
+	private final Map<Integer, List<IAEItemStack>> substituteInputs;
 	private final boolean isCrafting;
 	private final boolean canSubstitute;
 	private final Set<TestLookup> failCache = new HashSet<>();
@@ -143,9 +147,11 @@ public class PatternHelper implements ICraftingPatternDetails, Comparable<Patter
 				}
 			}
 		}
+		final int outputLength = this.isCrafting ? CRAFTING_OUTPUT_LIMIT : PROCESSING_OUTPUT_LIMIT;
 
-		this.outputs = out.toArray( new IAEItemStack[out.size()] );
-		this.inputs = in.toArray( new IAEItemStack[in.size()] );
+		this.inputs = in.toArray(new IAEItemStack[ALL_INPUT_LIMIT]);
+		this.outputs = out.toArray(new IAEItemStack[outputLength]);
+		this.substituteInputs = new HashMap<>(ALL_INPUT_LIMIT);
 
 		final Map<IAEItemStack, IAEItemStack> tmpOutputs = new HashMap<>();
 
@@ -257,6 +263,14 @@ public class PatternHelper implements ICraftingPatternDetails, Comparable<Patter
 
 		this.testFrame.setInventorySlotContents( slotIndex, i );
 
+		// If we cannot substitute, the items must match exactly
+		if (!canSubstitute && slotIndex < inputs.length) {
+			if (!inputs[slotIndex].isSameType(i)) {
+				this.markItemAs(slotIndex, i, TestStatus.DECLINE);
+				return false;
+			}
+		}
+
 		if( this.standardRecipe.matches( this.testFrame, w ) )
 		{
 			final ItemStack testOutput = this.standardRecipe.getCraftingResult( this.testFrame );
@@ -268,25 +282,6 @@ public class PatternHelper implements ICraftingPatternDetails, Comparable<Patter
 				return true;
 			}
 		}
-		else if( AEConfig.instance().isFeatureEnabled( AEFeature.CRAFTING_MANAGER_FALLBACK ) )
-		{
-			final ItemStack testOutput = CraftingManager.findMatchingResult( this.testFrame, w );
-
-			if( Platform.itemComparisons().isSameItem( this.correctOutput, testOutput ) )
-			{
-				this.testFrame.setInventorySlotContents( slotIndex, this.crafting.getStackInSlot( slotIndex ) );
-				this.markItemAs( slotIndex, i, TestStatus.ACCEPT );
-
-				if( AELog.isCraftingDebugLogEnabled() )
-				{
-					this.warnAboutCraftingManager( true );
-				}
-
-				return true;
-			}
-
-			this.warnAboutCraftingManager( false );
-		}
 
 		this.markItemAs( slotIndex, i, TestStatus.DECLINE );
 		return false;
@@ -328,6 +323,97 @@ public class PatternHelper implements ICraftingPatternDetails, Comparable<Patter
 		return this.canSubstitute;
 	}
 
+	@Override
+	public List<IAEItemStack> getSubstituteInputs(int slot) {
+		if (this.inputs[slot] == null) {
+			return Collections.emptyList();
+		}
+
+		return this.substituteInputs.computeIfAbsent(slot, value -> {
+			ItemStack[] matchingStacks = getRecipeIngredient(slot).getMatchingStacks();
+			List<IAEItemStack> itemList = new ArrayList<>(matchingStacks.length + 1);
+			for (ItemStack matchingStack : matchingStacks) {
+				itemList.add(AEItemStack.fromItemStack(matchingStack));
+			}
+
+			// Ensure that the specific item put in by the user is at the beginning,
+			// so that it takes precedence over substitutions
+			itemList.add(0, this.inputs[slot]);
+			return itemList;
+		});
+	}
+
+	/**
+	 * Gets the {@link Ingredient} from the actual used recipe for a given slot-index into {@link #getInputs()}.
+	 * <p/>
+	 * Conversion is needed for two reasons: our sparse ingredients are always organized in a 3x3 grid, while Vanilla's
+	 * ingredient list will be condensed to the actual recipe's grid size. In addition, in our 3x3 grid, the user can
+	 * shift the actual recipe input to the right and down.
+	 */
+	private Ingredient getRecipeIngredient(int slot) {
+
+		if (standardRecipe instanceof IShapedRecipe ) {
+			IShapedRecipe shapedRecipe = (IShapedRecipe) standardRecipe;
+
+			return getShapedRecipeIngredient(slot, shapedRecipe.getRecipeWidth());
+		} else {
+			return getShapelessRecipeIngredient(slot);
+		}
+	}
+
+	private Ingredient getShapedRecipeIngredient(int slot, int recipeWidth) {
+		// Compute the offset of the user's input vs. crafting grid origin
+		// Which is >0 if they have empty rows above or to the left of their input
+		int topOffset = 0;
+		if (inputs[0] == null && inputs[1] == null && inputs[2] == null) {
+			topOffset++; // First row is fully empty
+			if (inputs[3] == null && inputs[4] == null && inputs[5] == null) {
+				topOffset++; // Second row is fully empty
+			}
+		}
+		int leftOffset = 0;
+		if (inputs[0] == null && inputs[3] == null && inputs[6] == null) {
+			leftOffset++; // First column is fully empty
+			if (inputs[1] == null && inputs[4] == null && inputs[7] == null) {
+				leftOffset++; // Second column is fully empty
+			}
+		}
+
+		// Compute the x,y of the slot, as-if the recipe was anchored to 0,0
+		int slotX = slot % CRAFTING_GRID_DIMENSION - leftOffset;
+		int slotY = slot / CRAFTING_GRID_DIMENSION - topOffset;
+
+		// Compute the index into the recipe's ingredient list now
+		int ingredientIndex = slotY * recipeWidth + slotX;
+
+		NonNullList<Ingredient> ingredients = standardRecipe.getIngredients();
+
+		if (ingredientIndex < 0 || ingredientIndex > ingredients.size()) {
+			return Ingredient.EMPTY;
+		}
+
+		return ingredients.get(ingredientIndex);
+	}
+
+	private Ingredient getShapelessRecipeIngredient(int slot) {
+		// We map the list of *filled* sparse inputs to the shapeless (ergo unordered)
+		// ingredients. While these do not actually correspond to each other,
+		// since both lists have the same length, the mapping is at least stable.
+		int ingredientIndex = 0;
+		for (int i = 0; i < slot; i++) {
+			if (inputs[i] != null) {
+				ingredientIndex++;
+			}
+		}
+
+		NonNullList<Ingredient> ingredients = standardRecipe.getIngredients();
+		if (ingredientIndex < ingredients.size()) {
+			return ingredients.get(ingredientIndex);
+		}
+
+		return Ingredient.EMPTY;
+	}
+	
 	@Override
 	public ItemStack getOutput( final InventoryCrafting craftingInv, final World w )
 	{
@@ -406,24 +492,6 @@ public class PatternHelper implements ICraftingPatternDetails, Comparable<Patter
 		return this.pattern.hashCode();
 	}
 
-	private void warnAboutCraftingManager( boolean foundAlternative )
-	{
-		final String foundAlternativeRecipe = foundAlternative ? "Found alternative recipe." : "NOT FOUND, please report.";
-
-		final StringJoiner joinActualInputs = new StringJoiner( ", " );
-		for( int j = 0; j < this.testFrame.getSizeInventory(); j++ )
-		{
-			final ItemStack stack = this.testFrame.getStackInSlot( j );
-			if( !stack.isEmpty() )
-			{
-				joinActualInputs.add( stack.toString() );
-			}
-		}
-
-		AELog.warn( "Using CraftingManager fallback: Recipe <%s> for output <%s> rejected inputs [%s]. %s",
-				this.standardRecipe.getRegistryName(), this.standardRecipe.getRecipeOutput(), joinActualInputs, foundAlternativeRecipe );
-	}
-
 	@Override
 	public boolean equals( final Object obj )
 	{

src/main/java/appeng/integration/modules/jei/RecipeTransferHandler.java

@@ -147,8 +147,12 @@ class RecipeTransferHandler<T extends Container> implements IRecipeTransferHandl
 						}
 
 						// prefer pure crystals.
-						for( ItemStack stack : ingredient.getAllIngredients() )
+						for ( ItemStack stack : ingredient.getAllIngredients() )
 						{
+							if( stack == null )
+							{
+								continue;
+							}
 							if( Platform.isRecipePrioritized( stack ) )
 							{
 								list.add( 0, stack );
@@ -159,7 +163,7 @@ class RecipeTransferHandler<T extends Container> implements IRecipeTransferHandl
 							}
 						}
 
-						for( final ItemStack is : list )
+						for ( final ItemStack is : list )
 						{
 							final NBTTagCompound tag = new NBTTagCompound();
 							is.writeToNBT( tag );

src/main/java/appeng/items/materials/ItemMaterial.java

@@ -164,6 +164,8 @@ public final class ItemMaterial extends AEBaseItem implements IStorageComponent,
 				return Upgrades.INVERTER;
 			case CARD_CRAFTING:
 				return Upgrades.CRAFTING;
+			case CARD_PATTERN_EXPANSION:
+				return Upgrades.PATTERN_EXPANSION;
 			default:
 				return null;
 		}

src/main/java/appeng/items/materials/MaterialType.java

@@ -118,7 +118,10 @@ public enum MaterialType
 	FLUID_CELL1K_PART( 54, "material_fluid_cell1k_part", EnumSet.of( AEFeature.STORAGE_CELLS ) ),
 	FLUID_CELL4K_PART( 55, "material_fluid_cell4k_part", EnumSet.of( AEFeature.STORAGE_CELLS ) ),
 	FLUID_CELL16K_PART( 56, "material_fluid_cell16k_part", EnumSet.of( AEFeature.STORAGE_CELLS ) ),
-	FLUID_CELL64K_PART( 57, "material_fluid_cell64k_part", EnumSet.of( AEFeature.STORAGE_CELLS ) );
+	FLUID_CELL64K_PART( 57, "material_fluid_cell64k_part", EnumSet.of( AEFeature.STORAGE_CELLS ) ),
+
+	CARD_PATTERN_EXPANSION( 58, "material_card_pattern_expansion", EnumSet.of( AEFeature.ADVANCED_CARDS ) );
+
 
 	private final Set<AEFeature> features;
 	private final ModelResourceLocation model;

src/main/java/appeng/items/misc/ItemEncodedPattern.java

@@ -225,7 +225,7 @@ public class ItemEncodedPattern extends AEBaseItem implements ICraftingPatternIt
 
 		final ICraftingPatternDetails details = this.getPatternForItem( item, w );
 
-		out = details != null ? details.getOutputs()[0].createItemStack() : ItemStack.EMPTY;
+		out = details != null ? details.getCondensedOutputs()[0].createItemStack() : ItemStack.EMPTY;
 
 		SIMPLE_CACHE.put( item, out );
 		return out;

src/main/java/appeng/me/GridNode.java

@@ -633,10 +633,10 @@ public class GridNode implements IGridNode, IPathItem
 			this.usedChannels = 0;
 		}
 
-		final int idx = this.connections.indexOf( fast );
+		final int idx = this.connections.indexOf( (IGridConnection) fast );
 		if( idx > 0 )
 		{
-			this.connections.remove( fast );
+			this.connections.remove( (IGridConnection) fast );
 			this.connections.add( 0, (IGridConnection) fast );
 		}
 	}

src/main/java/appeng/me/cache/CraftingGridCache.java

@@ -42,6 +42,10 @@ import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Multimap;
 
+import it.unimi.dsi.fastutil.objects.Object2ObjectMap;
+import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
+import it.unimi.dsi.fastutil.objects.ObjectRBTreeSet;
+import it.unimi.dsi.fastutil.objects.ObjectSet;
 import net.minecraft.world.World;
 
 import appeng.api.AEApi;
@@ -105,8 +109,8 @@ public class CraftingGridCache implements ICraftingGrid, ICraftingProviderHelper
 	private final Set<ICraftingProvider> craftingProviders = new HashSet<>();
 	private final Map<IGridNode, ICraftingWatcher> craftingWatchers = new HashMap<>();
 	private final IGrid grid;
-	private final Map<ICraftingPatternDetails, List<ICraftingMedium>> craftingMethods = new HashMap<>();
-	private final Map<IAEItemStack, ImmutableList<ICraftingPatternDetails>> craftableItems = new HashMap<>();
+	private final Object2ObjectMap<ICraftingPatternDetails, List<ICraftingMedium>> craftingMethods = new Object2ObjectOpenHashMap<>();
+	private final Object2ObjectMap<IAEItemStack, ImmutableList<ICraftingPatternDetails>> craftableItems = new Object2ObjectOpenHashMap<>();
 	private final Set<IAEItemStack> emitableItems = new HashSet<>();
 	private final Map<String, CraftingLinkNexus> craftingLinks = new HashMap<>();
 	private final Multimap<IAEStack, CraftingWatcher> interests = HashMultimap.create();
@@ -160,11 +164,11 @@ public class CraftingGridCache implements ICraftingGrid, ICraftingProviderHelper
 	{
 		if( machine instanceof ICraftingWatcherHost )
 		{
-			final ICraftingWatcher craftingWatcher = this.craftingWatchers.get( machine );
+			final ICraftingWatcher craftingWatcher = this.craftingWatchers.get( gridNode );
 			if( craftingWatcher != null )
 			{
 				craftingWatcher.reset();
-				this.craftingWatchers.remove( machine );
+				this.craftingWatchers.remove( gridNode );
 			}
 		}
 
@@ -270,7 +274,7 @@ public class CraftingGridCache implements ICraftingGrid, ICraftingProviderHelper
 			return;
 		}
 
-		final Map<IAEItemStack, ImmutableList<ICraftingPatternDetails>> oldItems = this.craftableItems;
+		final Object2ObjectMap<IAEItemStack, ImmutableList<ICraftingPatternDetails>> oldItems = this.craftableItems;
 
 		// erase list.
 		this.craftingMethods.clear();
@@ -287,22 +291,22 @@ public class CraftingGridCache implements ICraftingGrid, ICraftingProviderHelper
 			provider.provideCrafting( this );
 		}
 
-		final Map<IAEItemStack, Set<ICraftingPatternDetails>> tmpCraft = new HashMap<>();
+		final Object2ObjectMap<IAEItemStack, ObjectSet<ICraftingPatternDetails>> tmpCraft = new Object2ObjectOpenHashMap<>();
 
 		// new craftables!
 		for( final ICraftingPatternDetails details : this.craftingMethods.keySet() )
 		{
-			for( IAEItemStack out : details.getOutputs() )
+			for( IAEItemStack out : details.getCondensedOutputs() )
 			{
 				out = out.copy();
 				out.reset();
 				out.setCraftable( true );
 
-				Set<ICraftingPatternDetails> methods = tmpCraft.get( out );
+				ObjectSet<ICraftingPatternDetails> methods = tmpCraft.get( out );
 
 				if( methods == null )
 				{
-					tmpCraft.put( out, methods = new TreeSet<>( COMPARATOR ) );
+					tmpCraft.put( out, methods = new ObjectRBTreeSet<>( COMPARATOR ) );
 				}
 
 				methods.add( details );
@@ -310,7 +314,7 @@ public class CraftingGridCache implements ICraftingGrid, ICraftingProviderHelper
 		}
 
 		// make them immutable
-		for( final Entry<IAEItemStack, Set<ICraftingPatternDetails>> e : tmpCraft.entrySet() )
+		for( final Entry<IAEItemStack, ObjectSet<ICraftingPatternDetails>> e : tmpCraft.entrySet() )
 		{
 			this.craftableItems.put( e.getKey(), ImmutableList.copyOf( e.getValue() ) );
 		}
@@ -635,7 +639,11 @@ public class CraftingGridCache implements ICraftingGrid, ICraftingProviderHelper
 
 	public boolean hasCpu( final ICraftingCPU cpu )
 	{
-		return this.craftingCPUClusters.contains( cpu );
+		if (cpu instanceof CraftingCPUCluster)
+		{
+			return this.craftingCPUClusters.contains( (CraftingCPUCluster) cpu );
+		}
+		return false;
 	}
 
 	public GenericInterestManager<CraftingWatcher> getInterestManager()

src/main/java/appeng/me/cache/EnergyGridCache.java

@@ -30,6 +30,7 @@ import java.util.PriorityQueue;
 import java.util.Queue;
 import java.util.Set;
 
+import com.google.common.base.Preconditions;
 import com.google.common.collect.HashMultiset;
 import com.google.common.collect.Multiset;
 import com.google.common.collect.Sets;
@@ -63,7 +64,7 @@ import appeng.me.energy.EnergyWatcher;
 public class EnergyGridCache implements IEnergyGrid
 {
 
-	private static final double MAX_BUFFER_STORAGE = 200;
+	private static final double MAX_BUFFER_STORAGE = 800;
 	private static final Comparator<IEnergyGridProvider> COMPARATOR_HIGHEST_AMOUNT_STORED_FIRST = ( o1, o2 ) -> Double.compare( o2.getProviderStoredEnergy(),
 			o1.getProviderStoredEnergy() );
 
@@ -76,9 +77,24 @@ public class EnergyGridCache implements IEnergyGrid
 	};
 
 	private final NavigableSet<EnergyThreshold> interests = Sets.newTreeSet();
+
+	// Should only be modified from the add/remove methods below to guard against
+	// concurrent modifications
 	private final double averageLength = 40.0;
 	private final Set<IAEPowerStorage> providers = new LinkedHashSet<>();
+	// Used to track whether an extraction is currently in progress, to fail fast
+	// when something externally
+	// modifies the energy grid.
+	private boolean ongoingExtractOperation = false;
+
+	// Should only be modified from the add/remove methods below to guard against
+	// concurrent modifications
 	private final Set<IAEPowerStorage> requesters = new LinkedHashSet<>();
+	// Used to track whether an injection is currently in progress, to fail fast
+	// when something externally
+	// modifies the energy grid.
+	private boolean ongoingInjectOperation = false;
+
 	private final Multiset<IEnergyGridProvider> energyGridProviders = HashMultiset.create();
 	private final IGrid myGrid;
 	private final HashMap<IGridNode, IEnergyWatcher> watchers = new HashMap<>();
@@ -110,6 +126,10 @@ public class EnergyGridCache implements IEnergyGrid
 	private double lastStoredPower = -1;
 
 	private final GridPowerStorage localStorage = new GridPowerStorage();
+	private Set<IAEPowerStorage> providerToRemove = new HashSet<>();
+	private Set<IAEPowerStorage> requesterToRemove = new HashSet<>();
+	private Set<IAEPowerStorage> providersToAdd = new HashSet<>();
+	private Set<IAEPowerStorage> requesterToAdd = new HashSet<>();
 
 	public EnergyGridCache( final IGrid g )
 	{
@@ -143,18 +163,32 @@ public class EnergyGridCache implements IEnergyGrid
 	{
 		if( ev.storage.isAEPublicPowerStorage() )
 		{
-			switch( ev.type )
+			switch ( ev.type )
 			{
 				case PROVIDE_POWER:
 					if( ev.storage.getPowerFlow() != AccessRestriction.WRITE )
 					{
-						this.providers.add( ev.storage );
+						if( !ongoingExtractOperation )
+						{
+							addProvider( ev.storage );
+						}
+						else
+						{
+							this.providersToAdd.add( ev.storage );
+						}
 					}
 					break;
 				case REQUEST_POWER:
 					if( ev.storage.getPowerFlow() != AccessRestriction.READ )
 					{
-						this.requesters.add( ev.storage );
+						if( !ongoingInjectOperation )
+						{
+							addRequester( ev.storage );
+						}
+						else
+						{
+							this.requesterToAdd.add( ev.storage );
+						}
 					}
 					break;
 			}
@@ -197,7 +231,7 @@ public class EnergyGridCache implements IEnergyGrid
 		if( this.drainPerTick > 0.0001 )
 		{
 			final double drained = this.extractAEPower( this.getIdlePowerUsage(), Actionable.MODULATE, PowerMultiplier.CONFIG );
-			currentlyHasPower = drained >= this.drainPerTick - 0.001;
+			currentlyHasPower = drained >= this.drainPerTick - 0.001 && this.getStoredPower() > 0;
 		}
 		else
 		{
@@ -301,20 +335,32 @@ public class EnergyGridCache implements IEnergyGrid
 	{
 		double extractedPower = 0;
 
+		this.providers.addAll( providersToAdd );
+		providersToAdd.clear();
+
 		final Iterator<IAEPowerStorage> it = this.providers.iterator();
 
-		while( extractedPower < amt && it.hasNext() )
+		ongoingExtractOperation = true;
+		try
 		{
-			final IAEPowerStorage node = it.next();
-
-			final double req = amt - extractedPower;
-			final double newPower = node.extractAEPower( req, mode, PowerMultiplier.ONE );
-			extractedPower += newPower;
-
-			if( newPower < req && mode == Actionable.MODULATE )
+			while ( extractedPower < amt && it.hasNext() )
 			{
-				it.remove();
+				final IAEPowerStorage node = it.next();
+
+				final double req = amt - extractedPower;
+				final double newPower = node.extractAEPower( req, mode, PowerMultiplier.ONE );
+				extractedPower += newPower;
+
+				if( newPower < req && mode == Actionable.MODULATE )
+				{
+					it.remove();
+				}
 			}
+		} finally
+		{
+			providers.removeIf( p -> providerToRemove.contains( p ) );
+			this.providerToRemove.clear();
+			ongoingExtractOperation = false;
 		}
 
 		final double result = Math.min( extractedPower, amt );
@@ -338,17 +384,30 @@ public class EnergyGridCache implements IEnergyGrid
 	{
 		final double originalAmount = amt;
 
+		this.requesters.addAll( requesterToAdd );
+		requesterToAdd.clear();
+
 		final Iterator<IAEPowerStorage> it = this.requesters.iterator();
 
-		while( amt > 0 && it.hasNext() )
+		ongoingInjectOperation = true;
+		try
 		{
-			final IAEPowerStorage node = it.next();
-			amt = node.injectAEPower( amt, mode );
-
-			if( amt > 0 && mode == Actionable.MODULATE )
+			while ( amt > 0 && it.hasNext() )
 			{
-				it.remove();
+				final IAEPowerStorage node = it.next();
+
+				amt = node.injectAEPower( amt, mode );
+
+				if( amt > 0 && mode == Actionable.MODULATE )
+				{
+					it.remove();
+				}
 			}
+		} finally
+		{
+			requesters.removeIf( r -> requesterToRemove.contains( r ) );
+			this.requesterToRemove.clear();
+			ongoingInjectOperation = false;
 		}
 
 		final double overflow = Math.max( 0.0, amt );
@@ -428,11 +487,7 @@ public class EnergyGridCache implements IEnergyGrid
 	@Override
 	public double getStoredPower()
 	{
-		if( this.availableTicksSinceUpdate > 90 )
-		{
-			this.refreshPower();
-		}
-
+		this.refreshPower();
 		return Math.max( 0.0, this.globalAvailablePower );
 	}
 
@@ -505,9 +560,22 @@ public class EnergyGridCache implements IEnergyGrid
 					this.globalMaxPower -= ps.getAEMaxPower();
 					this.globalAvailablePower -= ps.getAECurrentPower();
 				}
-
-				this.providers.remove( ps );
-				this.requesters.remove( ps );
+				if( !ongoingExtractOperation )
+				{
+					removeProvider( ps );
+				}
+				else
+				{
+					this.providerToRemove.add( ps );
+				}
+				if( !ongoingInjectOperation )
+				{
+					removeRequester( ps );
+				}
+				else
+				{
+					this.requesterToRemove.add( ps );
+				}
 			}
 		}
 
@@ -523,6 +591,31 @@ public class EnergyGridCache implements IEnergyGrid
 		}
 	}
 
+	private void addRequester(IAEPowerStorage requester) {
+		Preconditions.checkState(!ongoingInjectOperation,
+				"Cannot modify energy requesters while energy is being injected.");
+		this.requesters.add(requester);
+	}
+
+	private void removeRequester(IAEPowerStorage requester) {
+		Preconditions.checkState(!ongoingInjectOperation,
+				"Cannot modify energy requesters while energy is being injected.");
+		this.requesters.remove(requester);
+	}
+
+	private void addProvider(IAEPowerStorage provider) {
+		Preconditions.checkState(!ongoingExtractOperation,
+				"Cannot modify energy providers while energy is being extracted.");
+		this.providers.add(provider);
+	}
+
+	private void removeProvider(IAEPowerStorage provider) {
+		Preconditions.checkState(!ongoingExtractOperation,
+				"Cannot modify energy providers while energy is being extracted.");
+		this.providers.remove(provider);
+	}
+
+
 	@Override
 	public void addNode( final IGridNode node, final IGridHost machine )
 	{
@@ -554,12 +647,26 @@ public class EnergyGridCache implements IEnergyGrid
 				if( current > 0 && ps.getPowerFlow() != AccessRestriction.WRITE )
 				{
 					this.globalAvailablePower += current;
-					this.providers.add( ps );
+					if( !ongoingExtractOperation )
+					{
+						addProvider( ps );
+					}
+					else
+					{
+						this.providersToAdd.add( ps );
+					}
 				}
 
 				if( current < max && ps.getPowerFlow() != AccessRestriction.READ )
 				{
-					this.requesters.add( ps );
+					if( !ongoingInjectOperation )
+					{
+						addRequester( ps );
+					}
+					else
+					{
+						this.requesterToAdd.add( ps );
+					}
 				}
 			}
 		}
@@ -681,8 +788,12 @@ public class EnergyGridCache implements IEnergyGrid
 
 			if( this.stored < 0.01 )
 			{
-				EnergyGridCache.this.ticksSinceHasPowerChange = 0;
-				EnergyGridCache.this.publicPowerState( false, EnergyGridCache.this.myGrid );
+				refreshPower();
+				if (globalAvailablePower < MAX_BUFFER_STORAGE - 0.001)
+				{
+					EnergyGridCache.this.ticksSinceHasPowerChange = 0;
+					EnergyGridCache.this.publicPowerState( false, EnergyGridCache.this.myGrid );
+				}
 			}
 		}
 	}

src/main/java/appeng/me/cache/GridStorageCache.java

@@ -101,12 +101,12 @@ public class GridStorageCache implements IStorageGrid
 
 		if( machine instanceof IStackWatcherHost )
 		{
-			final IStackWatcher myWatcher = this.watchers.get( machine );
+			final IStackWatcher myWatcher = this.watchers.get( node );
 
 			if( myWatcher != null )
 			{
 				myWatcher.reset();
-				this.watchers.remove( machine );
+				this.watchers.remove( node );
 			}
 		}
 	}

src/main/java/appeng/me/cache/NetworkMonitor.java

@@ -19,17 +19,21 @@
 package appeng.me.cache;
 
 
+import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Deque;
-import java.util.HashMap;
 import java.util.Iterator;
-import java.util.Map;
 import java.util.Map.Entry;
 
 import javax.annotation.Nonnegative;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
+import appeng.api.AEApi;
+import appeng.api.storage.channels.IFluidStorageChannel;
+import appeng.api.storage.channels.IItemStorageChannel;
+import appeng.api.storage.data.IAEFluidStack;
+import appeng.api.storage.data.IAEItemStack;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Queues;
 
@@ -66,6 +70,8 @@ public class NetworkMonitor<T extends IAEStack<T>> implements IMEMonitor<T>
 	private boolean hasChanged = false;
 	@Nonnegative
 	private int localDepthSemaphore = 0;
+	private long gridItemCount;
+	private long gridFluidCount;
 
 	public NetworkMonitor( final GridStorageCache cache, final IStorageChannel<T> chan )
 	{
@@ -137,6 +143,32 @@ public class NetworkMonitor<T extends IAEStack<T>> implements IMEMonitor<T>
 		return this.getHandler().getSlot();
 	}
 
+	public long getGridCurrentCount()
+	{
+		if( myChannel == AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ) )
+		{
+			return gridItemCount;
+		}
+		else if( myChannel == AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ) )
+		{
+			return gridFluidCount;
+		}
+		return 0;
+	}
+
+	public long incGridCurrentCount(long count)
+	{
+		if( myChannel == AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ) )
+		{
+			return gridItemCount += count;
+		}
+		else if( myChannel == AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ) )
+		{
+			return gridFluidCount += count;
+		}
+		return 0;
+	}
+
 	@Nonnull
 	@Override
 	public IItemList<T> getStorageList()
@@ -230,7 +262,7 @@ public class NetworkMonitor<T extends IAEStack<T>> implements IMEMonitor<T>
 		{
 			final Entry<IMEMonitorHandlerReceiver<T>, Object> o = i.next();
 			final IMEMonitorHandlerReceiver<T> receiver = o.getKey();
-			if( receiver.isValid( o.getValue() ) )
+			if( receiver.isValid( o.getValue() ) && receiver.hasListeners() )
 			{
 				receiver.postChange( this, diff, src );
 			}
@@ -258,9 +290,7 @@ public class NetworkMonitor<T extends IAEStack<T>> implements IMEMonitor<T>
 
 		this.sendEvent = true;
 
-		this.notifyListenersOfChange( changes, src );
-
-		for( final T changedItem : changes )
+		for ( final T changedItem : changes )
 		{
 			T difference = changedItem;
 
@@ -270,25 +300,20 @@ public class NetworkMonitor<T extends IAEStack<T>> implements IMEMonitor<T>
 				difference.setStackSize( -changedItem.getStackSize() );
 			}
 
+			incGridCurrentCount( difference.getStackSize() );
+			this.cachedList.add( difference );
+
 			if( this.myGridCache.getInterestManager().containsKey( changedItem ) )
 			{
 				final Collection<ItemWatcher> list = this.myGridCache.getInterestManager().get( changedItem );
 
 				if( !list.isEmpty() )
 				{
-					IAEStack<T> fullStack = this.getStorageList().findPrecise( changedItem );
-
-					if( fullStack == null )
-					{
-						fullStack = changedItem.copy();
-						fullStack.setStackSize( 0 );
-					}
-
 					this.myGridCache.getInterestManager().enableTransactions();
 
 					for( final ItemWatcher iw : list )
 					{
-						iw.getHost().onStackChange( this.getStorageList(), fullStack, difference, src, this.getChannel() );
+						iw.getHost().onStackChange( difference, this.getChannel() );
 					}
 
 					this.myGridCache.getInterestManager().disableTransactions();
@@ -296,6 +321,8 @@ public class NetworkMonitor<T extends IAEStack<T>> implements IMEMonitor<T>
 			}
 		}
 
+		this.notifyListenersOfChange( changes, src );
+
 		final NetworkMonitor<?> last = GLOBAL_DEPTH.pop();
 		this.localDepthSemaphore--;
 
@@ -308,9 +335,28 @@ public class NetworkMonitor<T extends IAEStack<T>> implements IMEMonitor<T>
 	void forceUpdate()
 	{
 		this.hasChanged = true;
+		//when the grid comes back online, reset the count to 0 so
+		//it reflects the correct amount after the changes are accounted for
+
+		if( myChannel == AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ) )
+		{
+			gridItemCount = 0;
+			for( IAEItemStack iaeItemStack : (Iterable<IAEItemStack>) getStorageList() )
+			{
+				gridItemCount += iaeItemStack.getStackSize();
+			}
+		}
+		else if( myChannel == AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ) )
+		{
+			gridFluidCount = 0;
+			for( IAEFluidStack iaeFluidStack : (Iterable<IAEFluidStack>) getStorageList() )
+			{
+				gridFluidCount += iaeFluidStack.getStackSize();
+			}
+		}
 
 		final Iterator<Entry<IMEMonitorHandlerReceiver<T>, Object>> i = this.getListeners();
-		while( i.hasNext() )
+		while ( i.hasNext() )
 		{
 			final Entry<IMEMonitorHandlerReceiver<T>, Object> o = i.next();
 			final IMEMonitorHandlerReceiver<T> receiver = o.getKey();
@@ -333,5 +379,6 @@ public class NetworkMonitor<T extends IAEStack<T>> implements IMEMonitor<T>
 			this.sendEvent = false;
 			this.myGridCache.getGrid().postEvent( new MENetworkStorageEvent( this, this.myChannel ) );
 		}
+
 	}
 }

src/main/java/appeng/me/cache/PathGridCache.java

@@ -314,7 +314,7 @@ public class PathGridCache implements IPathingGrid
 		int depth = 0;
 		for( final IGridNode nodes : this.requireChannels )
 		{
-			if( !this.semiOpen.contains( nodes ) )
+			if( !this.semiOpen.contains( (IPathItem) nodes ) )
 			{
 				final IGridBlock gb = nodes.getGridBlock();
 				final EnumSet<GridFlags> flags = gb.getFlags();

src/main/java/appeng/me/cache/TickManagerCache.java

@@ -138,7 +138,6 @@ public class TickManagerCache implements ITickManager
 			tt.addEntityCrashInfo( crashreportcategory );
 			throw new ReportedException( crashreport );
 		}
-		PartLevelEmitter.wipeCache();
 	}
 
 	private void addToQueue( final TickTracker tt )

src/main/java/appeng/me/cluster/implementations/CraftingCPUCluster.java

@@ -23,6 +23,9 @@ import java.util.*;
 import java.util.Map.Entry;
 import java.util.stream.Collectors;
 
+import appeng.api.config.Upgrades;
+import appeng.helpers.DualityInterface;
+import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableList;
 
 import net.minecraft.inventory.InventoryCrafting;
@@ -233,8 +236,9 @@ public final class CraftingCPUCluster implements IAECluster, ICraftingCPU
 
 	public IAEItemStack injectItems( final IAEItemStack input, final Actionable type, final IActionSource src )
 	{
-		if( !( input instanceof IAEItemStack ) )
-		{
+		// also stop accepting items when the job is complete, i.e. to prevent re-insertion when pushing out
+		// items during storeItems
+		if (input == null || isComplete) {
 			return input;
 		}
 
@@ -292,7 +296,7 @@ public final class CraftingCPUCluster implements IAECluster, ICraftingCPU
 				{
 					is.decStackSize( what.getStackSize() );
 
-					this.updateElapsedTime( what );
+					this.updateRemainingItemCount( what );
 					this.markDirty();
 					this.postCraftingStatusChange( what.copy().setStackSize( -what.getStackSize() ) );
 
@@ -431,6 +435,11 @@ public final class CraftingCPUCluster implements IAECluster, ICraftingCPU
 			AELog.crafting( LOG_MARK_AS_COMPLETE, logStack );
 		}
 
+		// Waiting for can potentially contain items at this point, if the user has a 64xplank->64xbutton processing
+		// recipe for example, but only requested 1xbutton. We just ignore the rest since it will be dumped
+		// back into the network inventory regardless. For this to work it's important that injectItems in this CPU
+		// does not accept any further items if isComplete is true.
+		this.waitingFor.resetStatus();
 		this.remainingItemCount = 0;
 		this.startItemCount = 0;
 		this.lastTime = 0;
@@ -485,22 +494,87 @@ public final class CraftingCPUCluster implements IAECluster, ICraftingCPU
 		return null;
 	}
 
-	private boolean canCraft( final ICraftingPatternDetails details, final IAEItemStack[] condensedInputs )
+	private boolean canCraft(final ICraftingPatternDetails details, final IAEItemStack[] condensedInputs)
 	{
-		for( IAEItemStack g : condensedInputs )
+		if( !details.isCraftable() )
 		{
+			// Processing patterns are relatively easy
+			for ( IAEItemStack input : condensedInputs )
+			{
+				final IAEItemStack ais = this.inventory.extractItems( input.copy(), Actionable.SIMULATE,
+						this.machineSrc );
 
-			if( details.isCraftable() )
+				if( ais == null || ais.getStackSize() < input.getStackSize() )
+				{
+					return false;
+				}
+			}
+		}
+		else if( details.canSubstitute() )
+		{
+			// When substitutions are allowed, we have to keep track of which items we've reserved
+			IAEItemStack[] inputs = details.getInputs();
+			Map<IAEItemStack, Integer> consumedCount = new HashMap<>();
+			for ( int i = 0; i < inputs.length; i++ )
+			{
+				List<IAEItemStack> substitutes = details.getSubstituteInputs( i );
+				if( substitutes.isEmpty() )
+				{
+					continue;
+				}
+
+				boolean found = false;
+				for ( IAEItemStack substitute : substitutes )
+				{
+					for ( IAEItemStack fuzz : this.inventory.getItemList().findFuzzy( substitute, FuzzyMode.IGNORE_ALL ) )
+					{
+						int alreadyConsumed = consumedCount.getOrDefault( fuzz, 0 );
+						if( fuzz.getStackSize() - alreadyConsumed <= 0 )
+						{
+							continue; // Already fully consumed by a previous slot of this recipe
+						}
+
+						fuzz = fuzz.copy();
+						fuzz.setStackSize( 1 ); // We're iterating over non condensed inputs which means there's 1 of each needed
+						final IAEItemStack ais = this.inventory.extractItems( fuzz, Actionable.SIMULATE,
+								this.machineSrc );
+
+						if( ais != null && ais.getStackSize() > 0 )
+						{
+							// Mark 1 of the stack as consumed
+							consumedCount.merge( fuzz, 1, Integer::sum );
+							found = true;
+							break;
+						}
+					}
+					if( found )
+					{
+						break;
+					}
+				}
+
+				if( !found )
+				{
+					return false;
+				}
+			}
+
+		}
+		else
+		{
+			// When no substitutions can occur, we can simply check that all items are accounted since
+			// each type of item should only occur once
+			for ( IAEItemStack g : condensedInputs )
 			{
 				boolean found = false;
 
-				for( IAEItemStack fuzz : this.inventory.getItemList().findFuzzy( g, FuzzyMode.IGNORE_ALL ) )
+				for ( IAEItemStack fuzz : this.inventory.getItemList().findFuzzy( g, FuzzyMode.IGNORE_ALL ) )
 				{
 					fuzz = fuzz.copy();
 					fuzz.setStackSize( g.getStackSize() );
 					final IAEItemStack ais = this.inventory.extractItems( fuzz, Actionable.SIMULATE, this.machineSrc );
 
-					if (ais != null && ais.getStackSize() == g.getStackSize())
+					if( ais != null && ais.getStackSize() >= g.getStackSize() )
 					{
 						found = true;
 						break;
@@ -517,15 +591,7 @@ public final class CraftingCPUCluster implements IAECluster, ICraftingCPU
 					return false;
 				}
 			}
-			else
-			{
-				final IAEItemStack ais = this.inventory.extractItems( g.copy(), Actionable.SIMULATE, this.machineSrc );
 
-				if (ais == null || ais.getStackSize() < g.getStackSize())
-				{
-					return false;
-				}
-			}
 		}
 
 		return true;
@@ -680,71 +746,67 @@ public final class CraftingCPUCluster implements IAECluster, ICraftingCPU
 							ic = new InventoryCrafting( new ContainerNull(), 3, 3 );
 							boolean found = false;
 
-							for( int x = 0; x < input.length; x++ )
-							{
-								if( input[x] != null )
-								{
+							for (int x = 0; x < input.length; x++) {
+								if (input[x] != null) {
 									found = false;
 
-									if( details.isCraftable() )
-									{
+									if (details.isCraftable()) {
 										final Collection<IAEItemStack> itemList;
 
-										if( details.canSubstitute() )
-										{
-											itemList = this.inventory.getItemList().findFuzzy( input[x], FuzzyMode.IGNORE_ALL );
-										}
-										else
-										{
-											itemList = new ArrayList<>( 1 );
+										if (details.canSubstitute()) {
+											final List<IAEItemStack> substitutes = details.getSubstituteInputs(x);
+											itemList = new ArrayList<>(substitutes.size());
 
-											final IAEItemStack item = this.inventory.getItemList().findPrecise( input[x] );
+											for (IAEItemStack stack : substitutes) {
+												itemList.addAll(this.inventory.getItemList().findFuzzy(stack,
+														FuzzyMode.IGNORE_ALL));
+											}
+										} else {
+											itemList = new ArrayList<>(1);
 
-											if( item != null )
-											{
-												itemList.add( item );
+											final IAEItemStack item = this.inventory.getItemList()
+													.findPrecise(input[x]);
+
+											if (item != null) {
+												itemList.add(item);
 											}
 										}
 
-										for( IAEItemStack fuzz : itemList )
-										{
+										for (IAEItemStack fuzz : itemList) {
 											fuzz = fuzz.copy();
-											fuzz.setStackSize( input[x].getStackSize() );
+											fuzz.setStackSize(input[x].getStackSize());
 
-											if( details.isValidItemForSlot( x, fuzz.createItemStack(), this.getWorld() ) )
-											{
-												final IAEItemStack ais = this.inventory.extractItems( fuzz, Actionable.MODULATE, this.machineSrc );
-												final ItemStack is = ais == null ? ItemStack.EMPTY : ais.createItemStack();
+											if (details.isValidItemForSlot(x, fuzz.createItemStack(),
+													this.getWorld())) {
+												final IAEItemStack ais = this.inventory.extractItems(fuzz,
+														Actionable.MODULATE, this.machineSrc);
+												final ItemStack is = ais == null ? ItemStack.EMPTY
+														: ais.createItemStack();
 
-												if( !is.isEmpty() )
-												{
-													this.postChange( AEItemStack.fromItemStack( is ), this.machineSrc );
-													ic.setInventorySlotContents( x, is );
+												if (!is.isEmpty()) {
+													this.postChange(AEItemStack.fromItemStack(is), this.machineSrc);
+													ic.setInventorySlotContents(x, is);
 													found = true;
 													break;
 												}
 											}
 										}
-									}
-									else
-									{
-										final IAEItemStack ais = this.inventory.extractItems( input[x].copy(), Actionable.MODULATE, this.machineSrc );
+									} else {
+										final IAEItemStack ais = this.inventory.extractItems(input[x].copy(),
+												Actionable.MODULATE, this.machineSrc);
 										final ItemStack is = ais == null ? ItemStack.EMPTY : ais.createItemStack();
 
-										if( !is.isEmpty() )
-										{
-											this.postChange( input[x], this.machineSrc );
-											ic.setInventorySlotContents( x, is );
-											if( is.getCount() == input[x].getStackSize() )
-											{
+										if (!is.isEmpty()) {
+											this.postChange(input[x], this.machineSrc);
+											ic.setInventorySlotContents(x, is);
+											if (is.getCount() == input[x].getStackSize()) {
 												found = true;
 												continue;
 											}
 										}
 									}
 
-									if( !found )
-									{
+									if (!found) {
 										break;
 									}
 								}
@@ -828,6 +890,7 @@ public final class CraftingCPUCluster implements IAECluster, ICraftingCPU
 
 	private void storeItems()
 	{
+		Preconditions.checkState(isComplete, "CPU should be complete to prevent re-insertion when dumping items");
 		final IGrid g = this.getGrid();
 
 		if( g == null )
@@ -838,23 +901,24 @@ public final class CraftingCPUCluster implements IAECluster, ICraftingCPU
 		final IStorageGrid sg = g.getCache( IStorageGrid.class );
 		final IMEInventory<IAEItemStack> ii = sg.getInventory( AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ) );
 
-		for( IAEItemStack is : this.inventory.getItemList() )
+		IItemList<IAEItemStack> itemList = this.inventory.getItemList();
+		for( IAEItemStack is : itemList )
 		{
-			is = this.inventory.extractItems( is.copy(), Actionable.MODULATE, this.machineSrc );
+			this.postChange( is, this.machineSrc );
+			IAEItemStack remainder = ii.injectItems( is.copy(), Actionable.MODULATE, this.machineSrc );
 
-			if( is != null )
+			// The network was unable to receive all of the items, i.e. no or not enough storage space left
+			if( remainder != null )
 			{
-				this.postChange( is, this.machineSrc );
-				is = ii.injectItems( is, Actionable.MODULATE, this.machineSrc );
+				is.setStackSize( remainder.getStackSize() );
 			}
-
-			if( is != null )
+			else
 			{
-				this.inventory.injectItems( is, Actionable.MODULATE, this.machineSrc );
+				is.reset();
 			}
 		}
 
-		if( this.inventory.getItemList().isEmpty() )
+		if( itemList.isEmpty() )
 		{
 			this.inventory = new MECraftingInventory();
 		}
@@ -939,14 +1003,13 @@ public final class CraftingCPUCluster implements IAECluster, ICraftingCPU
 	@Override
 	public boolean isBusy()
 	{
-		final Iterator<Entry<ICraftingPatternDetails, TaskProgress>> i = this.tasks.entrySet().iterator();
 
-		while( i.hasNext() )
+		this.tasks.entrySet().removeIf(
+				taskProgressEntry -> taskProgressEntry.getValue().value <= 0 );
+
+		if( !this.waitingFor.isEmpty() || !this.tasks.isEmpty() )
 		{
-			if( i.next().getValue().value <= 0 )
-			{
-				i.remove();
-			}
+			this.updateElapsedTime();
 		}
 
 		return !this.tasks.isEmpty() || !this.waitingFor.isEmpty();
@@ -1338,12 +1401,16 @@ public final class CraftingCPUCluster implements IAECluster, ICraftingCPU
 		this.remainingItemCount = itemCount;
 	}
 
-	private void updateElapsedTime( final IAEItemStack is )
+	private void updateRemainingItemCount( final IAEItemStack is )
+	{
+		this.remainingItemCount = this.getRemainingItemCount() - is.getStackSize();
+	}
+
+	private void updateElapsedTime()
 	{
 		final long nextStartTime = System.nanoTime();
 		this.elapsedTime = this.getElapsedTime() + nextStartTime - this.lastTime;
 		this.lastTime = nextStartTime;
-		this.remainingItemCount = this.getRemainingItemCount() - is.getStackSize();
 	}
 
 	public long getElapsedTime()

src/main/java/appeng/me/helpers/GenericInterestManager.java

@@ -23,9 +23,10 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 
-import com.google.common.collect.Multimap;
-
+import appeng.api.config.FuzzyMode;
 import appeng.api.storage.data.IAEStack;
+import appeng.util.item.AEItemStack;
+import com.google.common.collect.Multimap;
 
 
 public class GenericInterestManager<T>
@@ -101,12 +102,30 @@ public class GenericInterestManager<T>
 
 	public boolean containsKey( final IAEStack stack )
 	{
+		if( stack.isItem() && ( ( AEItemStack ) stack ).getItem().isDamageable() )
+		{
+			return this.container.keySet().stream().filter( s -> s.isItem() )
+					.anyMatch( s -> s.fuzzyComparison( stack, FuzzyMode.IGNORE_ALL ) );
+		}
 		return this.container.containsKey( stack );
 	}
 
 	public Collection<T> get( final IAEStack stack )
 	{
-		return this.container.get( stack );
+		Collection<T> watchers = new ArrayList<>();
+		if( stack.isItem() && ( ( AEItemStack ) stack ).getItem().isDamageable() )
+		{
+			this.container.keySet().stream().filter( s -> s.isItem() )
+					.filter( k -> k.fuzzyComparison( stack, FuzzyMode.IGNORE_ALL ) )
+					.forEach( key ->
+							watchers.addAll( this.container.get( key ) )
+					);
+		}
+		else
+		{
+			return this.container.get( stack );
+		}
+		return watchers;
 	}
 
 	private class SavedTransactions

src/main/java/appeng/me/storage/AbstractCellInventory.java

@@ -151,7 +151,7 @@ public abstract class AbstractCellInventory<T extends IAEStack<T>> implements IC
 		}
 
 		// clean any old crusty stuff...
-		for( ; x < oldStoredItems && x < this.maxItemTypes; x++ )
+		for( ; x >= oldStoredItems && x < this.maxItemTypes; x++ )
 		{
 			this.tagCompound.removeTag( ITEM_SLOT_KEYS[x] );
 			this.tagCompound.removeTag( ITEM_SLOT_COUNT_KEYS[x] );

src/main/java/appeng/me/storage/BasicCellInventory.java

@@ -277,6 +277,7 @@ public class BasicCellInventory<T extends IAEStack<T>> extends AbstractCellInven
 		}
 
 		t.setStackSize( stackSize );
+		t.setCraftable( false );
 
 		if( stackSize > 0 )
 		{

src/main/java/appeng/me/storage/MEMonitorPassThrough.java

@@ -90,6 +90,13 @@ public class MEMonitorPassThrough<T extends IAEStack<T>> extends MEPassThrough<T
 	@Override
 	public void addListener( final IMEMonitorHandlerReceiver<T> l, final Object verificationToken )
 	{
+		if( this.listeners.size() == 0 )
+		{
+			if( this.monitor != null )
+			{
+				this.monitor.addListener( this, this.monitor );
+			}
+		}
 		this.listeners.put( l, verificationToken );
 	}
 
@@ -117,6 +124,12 @@ public class MEMonitorPassThrough<T extends IAEStack<T>> extends MEPassThrough<T
 		return verificationToken == this.monitor;
 	}
 
+	@Override
+	public boolean hasListeners()
+	{
+		return this.listeners.size() > 0;
+	}
+
 	@Override
 	public void postChange( final IBaseMonitor<T> monitor, final Iterable<T> change, final IActionSource source )
 	{

src/main/java/appeng/parts/automation/PartLevelEmitter.java

@@ -19,11 +19,17 @@
 package appeng.parts.automation;
 
 
+import java.util.Collections;
+import java.util.Optional;
 import java.util.Random;
 
+import appeng.api.networking.events.*;
 import appeng.me.Grid;
 import appeng.me.GridNode;
+import appeng.me.cache.NetworkMonitor;
 import appeng.util.item.AEItemStack;
+import appeng.util.item.OreHelper;
+import appeng.util.item.OreReference;
 import it.unimi.dsi.fastutil.objects.Object2LongMap;
 import it.unimi.dsi.fastutil.objects.Object2LongOpenHashMap;
 import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
@@ -56,10 +62,6 @@ import appeng.api.networking.crafting.ICraftingWatcherHost;
 import appeng.api.networking.energy.IEnergyGrid;
 import appeng.api.networking.energy.IEnergyWatcher;
 import appeng.api.networking.energy.IEnergyWatcherHost;
-import appeng.api.networking.events.MENetworkChannelsChanged;
-import appeng.api.networking.events.MENetworkCraftingPatternChange;
-import appeng.api.networking.events.MENetworkEventSubscribe;
-import appeng.api.networking.events.MENetworkPowerStatusChange;
 import appeng.api.networking.security.IActionSource;
 import appeng.api.networking.storage.IBaseMonitor;
 import appeng.api.networking.storage.IStackWatcher;
@@ -72,7 +74,6 @@ import appeng.api.storage.IStorageChannel;
 import appeng.api.storage.channels.IItemStorageChannel;
 import appeng.api.storage.data.IAEItemStack;
 import appeng.api.storage.data.IAEStack;
-import appeng.api.storage.data.IItemList;
 import appeng.api.util.AECableType;
 import appeng.api.util.AEPartLocation;
 import appeng.api.util.IConfigManager;
@@ -123,9 +124,6 @@ public class PartLevelEmitter extends PartUpgradeable implements IEnergyWatcherH
 	private double centerX;
 	private double centerY;
 	private double centerZ;
-	static Object2LongMap<Grid> gridItemCount = new Object2LongOpenHashMap<>();
-	static Object2ObjectOpenHashMap<Grid, Object2LongMap<AEItemStack>> fuzzyAEItemStackCount = new Object2ObjectOpenHashMap<>();
-	static Object2ObjectOpenHashMap<Grid, Object2LongMap<AEItemStack>> preciseAEItemStackCount = new Object2ObjectOpenHashMap<>();
 
 	@Reflected
 	public PartLevelEmitter( final ItemStack is )
@@ -156,12 +154,6 @@ public class PartLevelEmitter extends PartUpgradeable implements IEnergyWatcherH
 		}
 	}
 
-	@MENetworkEventSubscribe
-	public void powerChanged( final MENetworkPowerStatusChange c )
-	{
-		this.updateState();
-	}
-
 	private void updateState()
 	{
 		final boolean isOn = this.isLevelEmitterOn();
@@ -206,9 +198,23 @@ public class PartLevelEmitter extends PartUpgradeable implements IEnergyWatcherH
 		return flipState ? this.reportingValue >= this.lastReportedValue + 1 : this.reportingValue < this.lastReportedValue + 1;
 	}
 
+	@MENetworkEventSubscribe
+	public void powerStatusChange( final MENetworkPowerStatusChange powerEvent )
+	{
+		if (this.getProxy().isActive())
+		{
+			onListUpdate();
+		}
+		this.updateState();
+	}
+
 	@MENetworkEventSubscribe
 	public void channelChanged( final MENetworkChannelsChanged c )
 	{
+		if (this.getProxy().isActive())
+		{
+			onListUpdate();
+		}
 		this.updateState();
 	}
 
@@ -296,24 +302,37 @@ public class PartLevelEmitter extends PartUpgradeable implements IEnergyWatcherH
 
 		try
 		{
-			if( this.getInstalledUpgrades( Upgrades.FUZZY ) > 0 || myStack == null )
+
+			if( myStack == null )
 			{
-				this.getProxy()
-						.getStorage()
-						.getInventory( AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ) )
-						.addListener( this,
-								this.getProxy().getGrid() );
+				this.getProxy().getStorage().getInventory( AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ) ).addListener( this, this.getProxy().getGrid() );
 			}
 			else
 			{
 				this.getProxy().getStorage().getInventory( AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ) ).removeListener( this );
-
 				if( this.myWatcher != null )
 				{
-					this.myWatcher.add( myStack );
+					if( this.getInstalledUpgrades( Upgrades.FUZZY ) > 0 )
+					{
+						Optional<OreReference> ores = OreHelper.INSTANCE.getOre( myStack.getDefinition() );
+						if( ores.isPresent() )
+						{
+							for( IAEItemStack iaeItemStack : ores.get().getAEEquivalents() )
+							{
+								this.myWatcher.add( iaeItemStack );
+							}
+						}
+						else
+						{
+							this.myWatcher.add( myStack );
+						}
+					}
+					else
+					{
+						this.myWatcher.add( myStack );
+					}
 				}
 			}
-
 			this.updateReportingValue( this.getProxy().getStorage().getInventory( AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ) ) );
 		}
 		catch( final GridAccessException e )
@@ -323,90 +342,29 @@ public class PartLevelEmitter extends PartUpgradeable implements IEnergyWatcherH
 	}
 
 	private void updateReportingValue( final IMEMonitor<IAEItemStack> monitor )
-	{
-		updateReportingValue( monitor,null );
-	}
-
-	private void updateReportingValue( final IMEMonitor<IAEItemStack> monitor, Iterable<IAEItemStack> change )
 	{
 		final IAEItemStack myStack = this.config.getAEStackInSlot( 0 );
 
-		GridNode node = (GridNode) (this.getGridNode());
-
-		if( node != null )
+		if( myStack == null )
 		{
-
-			final Grid g = node.getInternalGrid();
-
-			if( myStack == null )
+			if( monitor instanceof NetworkMonitor )
 			{
-				if( change != null )
-				{
-					if( gridItemCount.containsKey( g ) )
-					{
-						change.forEach( iaeItemStack -> lastReportedValue += iaeItemStack.getStackSize() );
-					}
-				}
-				gridItemCount.computeIfAbsent( g, ( aLong ) -> {
-					this.lastReportedValue = 0;
-					monitor.getStorageList().forEach( iaeItemStack -> lastReportedValue += iaeItemStack.getStackSize() );
-					return ( lastReportedValue );
-				} );
-				this.lastReportedValue = gridItemCount.get( g );
+				this.lastReportedValue = ( (NetworkMonitor<IAEItemStack>) monitor ).getGridCurrentCount();
 			}
+		}
 
-			else if( this.getInstalledUpgrades( Upgrades.FUZZY ) > 0 )
-			{
-				final FuzzyMode fzMode = (FuzzyMode) this.getConfigManager().getSetting( Settings.FUZZY_MODE );
-				if( change != null )
-				{
-					if( fuzzyAEItemStackCount.containsKey( g ) )
-					{
-						change.forEach( iaeItemStack -> {
-							if( iaeItemStack.sameOre( myStack ) ) lastReportedValue += iaeItemStack.getStackSize();
-						} );
-					}
-				}
+		else if( this.getInstalledUpgrades( Upgrades.FUZZY ) > 0 )
+		{
+			final FuzzyMode fzMode = (FuzzyMode) this.getConfigManager().getSetting( Settings.FUZZY_MODE );
 
-				fuzzyAEItemStackCount.computeIfAbsent( g, ( grid -> new Object2LongOpenHashMap<>() ) );
-				fuzzyAEItemStackCount.get( g ).computeIfAbsent( (AEItemStack) myStack, ( aLong -> {
-					this.lastReportedValue = 0;
-					monitor.getStorageList().findFuzzy( myStack, fzMode ).forEach( iaeItemStack -> lastReportedValue += iaeItemStack.getStackSize() );
-					return ( lastReportedValue );
-				} ) );
-
-				this.lastReportedValue = fuzzyAEItemStackCount.get( g ).get( myStack );
-				if( this.lastReportedValue == 0 )
-				{
-					fuzzyAEItemStackCount.get( g ).remove( myStack );
-					fuzzyAEItemStackCount.trim();
-				}
-			}
-			else
-			{
-				if( change != null )
-				{
-					if( preciseAEItemStackCount.containsKey( g ) )
-					{
-						change.forEach( iaeItemStack -> {
-							if( iaeItemStack.isSameType( myStack ) ) lastReportedValue += iaeItemStack.getStackSize();
-						} );
-					}
-				}
-				preciseAEItemStackCount.computeIfAbsent( g, ( grid -> new Object2LongOpenHashMap<>() ) );
-				preciseAEItemStackCount.get( g ).computeIfAbsent( (AEItemStack) myStack, ( aLong -> {
-					this.lastReportedValue = 0;
-					IAEItemStack precise = monitor.getStorageList().findPrecise( myStack );
-					if( precise != null ) lastReportedValue = precise.getStackSize();
-					return ( lastReportedValue );
-				} ) );
-				this.lastReportedValue = preciseAEItemStackCount.get( g ).get( myStack );
-				if( this.lastReportedValue == 0 )
-				{
-					preciseAEItemStackCount.get( g ).remove( myStack );
-					preciseAEItemStackCount.trim();
-				}
-			}
+			this.lastReportedValue = 0;
+			monitor.getStorageList().findFuzzy( myStack, fzMode ).forEach( iaeItemStack -> lastReportedValue += iaeItemStack.getStackSize() );
+		}
+		else
+		{
+			this.lastReportedValue = 0;
+			IAEItemStack precise = monitor.getStorageList().findPrecise( myStack );
+			if( precise != null ) lastReportedValue = precise.getStackSize();
 		}
 		this.updateState();
 	}
@@ -419,12 +377,23 @@ public class PartLevelEmitter extends PartUpgradeable implements IEnergyWatcherH
 	}
 
 	@Override
-	public void onStackChange( final IItemList o, final IAEStack fullStack, final IAEStack diffStack, final IActionSource src, final IStorageChannel chan )
+	public void onStackChange( final IAEStack diffStack, final IStorageChannel chan )
 	{
-		if( chan == AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ) && fullStack.equals( this.config.getAEStackInSlot( 0 ) ) && this
-				.getInstalledUpgrades( Upgrades.FUZZY ) == 0 )
+		if( chan == AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ) )
 		{
-			this.lastReportedValue = fullStack.getStackSize();
+			IAEItemStack myStack = this.config.getAEStackInSlot( 0 );
+			if( this.getInstalledUpgrades( Upgrades.FUZZY ) > 0 )
+			{
+				final FuzzyMode fzMode = (FuzzyMode) this.getConfigManager().getSetting( Settings.FUZZY_MODE );
+				if( Platform.itemComparisons().isFuzzyEqualItem( myStack.getDefinition(), ( (IAEItemStack) diffStack ).getDefinition(), fzMode ) )
+				{
+					this.lastReportedValue += diffStack.getStackSize();
+				}
+			}
+			else if( diffStack.equals( myStack ) )
+			{
+				this.lastReportedValue += diffStack.getStackSize();
+			}
 			this.updateState();
 		}
 	}
@@ -459,7 +428,7 @@ public class PartLevelEmitter extends PartUpgradeable implements IEnergyWatcherH
 	@Override
 	public void postChange( final IBaseMonitor<IAEItemStack> monitor, final Iterable<IAEItemStack> change, final IActionSource actionSource )
 	{
-		this.updateReportingValue( (IMEMonitor<IAEItemStack>) monitor, change );
+		this.updateReportingValue( (IMEMonitor<IAEItemStack>) monitor );
 	}
 
 	@Override
@@ -636,9 +605,4 @@ public class PartLevelEmitter extends PartUpgradeable implements IEnergyWatcherH
 		}
 	}
 
-	public static void wipeCache(){
-		fuzzyAEItemStackCount.clear();
-		preciseAEItemStackCount.clear();
-		gridItemCount.clear();
-	}
 }

src/main/java/appeng/parts/automation/UpgradeInventory.java

@@ -19,10 +19,20 @@
 package appeng.parts.automation;
 
 
+import javax.annotation.Nonnull;
+import appeng.api.AEApi;
+import appeng.container.slot.SlotRestrictedInput;
+import appeng.core.Api;
+import appeng.helpers.DualityInterface;
+import appeng.util.inv.ItemHandlerIterator;
+import net.minecraft.client.Minecraft;
 import net.minecraft.init.Items;
+import net.minecraft.inventory.Slot;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NBTTagCompound;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
 import net.minecraftforge.items.IItemHandler;
 
 import appeng.api.config.Upgrades;
@@ -33,6 +43,9 @@ import appeng.util.inv.IAEAppEngInventory;
 import appeng.util.inv.InvOperation;
 import appeng.util.inv.filter.IAEItemFilter;
 
+import java.util.ArrayList;
+import java.util.List;
+
 
 public abstract class UpgradeInventory extends AppEngInternalInventory implements IAEAppEngInventory
 {
@@ -45,6 +58,7 @@ public abstract class UpgradeInventory extends AppEngInternalInventory implement
 	private int capacityUpgrades = 0;
 	private int inverterUpgrades = 0;
 	private int craftingUpgrades = 0;
+	private int patternExpansionUpgrades = 0;
 
 	public UpgradeInventory( final IAEAppEngInventory parent, final int s )
 	{
@@ -81,6 +95,8 @@ public abstract class UpgradeInventory extends AppEngInternalInventory implement
 				return this.inverterUpgrades;
 			case CRAFTING:
 				return this.craftingUpgrades;
+			case PATTERN_EXPANSION:
+				return this.patternExpansionUpgrades;
 			default:
 				return 0;
 		}
@@ -91,7 +107,7 @@ public abstract class UpgradeInventory extends AppEngInternalInventory implement
 	private void updateUpgradeInfo()
 	{
 		this.cached = true;
-		this.inverterUpgrades = this.capacityUpgrades = this.redstoneUpgrades = this.speedUpgrades = this.fuzzyUpgrades = this.craftingUpgrades = 0;
+		this.patternExpansionUpgrades = this.inverterUpgrades = this.capacityUpgrades = this.redstoneUpgrades = this.speedUpgrades = this.fuzzyUpgrades = this.craftingUpgrades = 0;
 
 		for( final ItemStack is : this )
 		{
@@ -121,6 +137,9 @@ public abstract class UpgradeInventory extends AppEngInternalInventory implement
 				case CRAFTING:
 					this.craftingUpgrades++;
 					break;
+				case PATTERN_EXPANSION:
+					this.patternExpansionUpgrades++;
+					break;
 				default:
 					break;
 			}
@@ -132,6 +151,7 @@ public abstract class UpgradeInventory extends AppEngInternalInventory implement
 		this.speedUpgrades = Math.min( this.speedUpgrades, this.getMaxInstalled( Upgrades.SPEED ) );
 		this.inverterUpgrades = Math.min( this.inverterUpgrades, this.getMaxInstalled( Upgrades.INVERTER ) );
 		this.craftingUpgrades = Math.min( this.craftingUpgrades, this.getMaxInstalled( Upgrades.CRAFTING ) );
+		this.patternExpansionUpgrades = Math.min( this.patternExpansionUpgrades, this.getMaxInstalled( Upgrades.PATTERN_EXPANSION ) );
 	}
 
 	@Override
@@ -160,6 +180,13 @@ public abstract class UpgradeInventory extends AppEngInternalInventory implement
 		}
 	}
 
+	@Nonnull
+	@Override
+	public ItemStack extractItem( int slot, int amount, boolean simulate )
+	{
+		return super.extractItem( slot, amount, simulate );
+	}
+
 	private class UpgradeInvFilter implements IAEItemFilter
 	{
 

src/main/java/appeng/parts/misc/ItemHandlerAdapter.java

@@ -19,17 +19,11 @@
 package appeng.parts.misc;
 
 
-import java.util.*;
-
-import appeng.api.config.Settings;
-import appeng.api.config.StorageFilter;
-import it.unimi.dsi.fastutil.objects.Object2ObjectMap;
-import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
-import net.minecraft.item.ItemStack;
-import net.minecraftforge.items.IItemHandler;
-
+import javax.annotation.Nullable;
 import appeng.api.AEApi;
 import appeng.api.config.Actionable;
+import appeng.api.config.Settings;
+import appeng.api.config.StorageFilter;
 import appeng.api.networking.security.IActionSource;
 import appeng.api.networking.storage.IBaseMonitor;
 import appeng.api.networking.ticking.TickRateModulation;
@@ -41,9 +35,16 @@ import appeng.api.storage.data.IItemList;
 import appeng.core.AELog;
 import appeng.me.helpers.IGridProxyable;
 import appeng.me.storage.ITickingMonitor;
-import appeng.util.Platform;
+import appeng.util.inv.ItemHandlerIterator;
+import appeng.util.inv.ItemSlot;
 import appeng.util.item.AEItemStack;
-import org.apache.commons.lang3.tuple.Pair;
+import com.google.common.primitives.Ints;
+import it.unimi.dsi.fastutil.objects.Object2ObjectMap;
+import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
+import net.minecraft.item.ItemStack;
+import net.minecraftforge.items.IItemHandler;
+
+import java.util.*;
 
 
 /**
@@ -58,6 +59,8 @@ class ItemHandlerAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<IAE
 	private final InventoryCache cache;
 	private StorageFilter mode;
 
+	private ItemStack stackCache = null;
+
 	ItemHandlerAdapter( IItemHandler itemHandler, IGridProxyable proxy )
 	{
 		this.itemHandler = itemHandler;
@@ -73,28 +76,36 @@ class ItemHandlerAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<IAE
 	@Override
 	public IAEItemStack injectItems( IAEItemStack iox, Actionable type, IActionSource src )
 	{
+		// Try to reuse the cached stack
+		@Nullable ItemStack currentCached = stackCache;
+		stackCache = null;
+
+		ItemStack orgInput;
+		int slotCount = this.itemHandler.getSlots();
+
+		if( currentCached != null && iox.isSameType( currentCached ) )
+		{
+			// Cache is suitable, just update the count
+			orgInput = currentCached;
+			currentCached.setCount( Ints.saturatedCast( iox.getStackSize() ) );
+		}
+		else
+		{
+			// We need a new stack :-(
+			orgInput = iox.createItemStack();
+		}
 
-		ItemStack orgInput = iox.createItemStack();
 		ItemStack remaining = orgInput;
 
-		int slotCount = this.itemHandler.getSlots();
-		boolean simulate = ( type == Actionable.SIMULATE );
-		List<Pair<Integer, Integer>> injectedList = new ArrayList<>();
-		// This uses a brute force approach and tries to jam it in every slot the inventory exposes.
-		for( int i = 0; i < slotCount && !remaining.isEmpty(); i++ )
+		for ( int i = 0; i < slotCount && !remaining.isEmpty(); i++ )
 		{
-			int countPre = remaining.getCount();
-			remaining = this.itemHandler.insertItem( i, remaining, simulate );
-			int countPos = remaining.getCount();
-			if( remaining.isEmpty() )
-			{
-				injectedList.add( Pair.of( i, countPre ) );
-				break;
-			}
-			else if( countPos < countPre )
-			{
-				injectedList.add( Pair.of( i, countPre - countPos ) );
-			}
+			remaining = this.itemHandler.insertItem( i, remaining, type == Actionable.SIMULATE );
+		}
+
+		// Store the stack in the cache for next time.
+		if( !remaining.isEmpty() && remaining != orgInput )
+		{
+			stackCache = remaining;
 		}
 
 		// At this point, we still have some items left...
@@ -106,30 +117,9 @@ class ItemHandlerAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<IAE
 
 		if( type == Actionable.MODULATE )
 		{
-			if( this.cache.cachedAeStacks.length == 0 )
-			{
-				this.cache.update();
-			}
-			else
-			{
-				for( Pair<Integer, Integer> pair : injectedList )
-				{
-					if( pair.getKey() >= this.cache.cachedAeStacks.length )
-					{
-						this.cache.update();
-						break;
-					}
-					if( this.cache.cachedAeStacks[pair.getKey()] == null )
-					{
-						this.cache.cachedAeStacks[pair.getKey()] = iox.copy().setStackSize( pair.getValue() );
-					}
-					else
-					{
-						this.cache.cachedAeStacks[pair.getKey()].incStackSize( pair.getValue() );
-					}
-				}
-			}
-
+			this.cache
+					.currentlyCached
+					.add( AEItemStack.fromItemStack( orgInput ).setStackSize( orgInput.getCount() - remaining.getCount() ) );
 		}
 
 		return AEItemStack.fromItemStack( remaining );
@@ -138,21 +128,17 @@ class ItemHandlerAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<IAE
 	@Override
 	public IAEItemStack extractItems( IAEItemStack request, Actionable mode, IActionSource src )
 	{
-		ItemStack requestedItemStack = request.createItemStack();
-		int remainingSize = requestedItemStack.getCount();
+		int remainingSize = Ints.saturatedCast( request.getStackSize() );
 
 		// Use this to gather the requested items
 		ItemStack gathered = ItemStack.EMPTY;
 
 		final boolean simulate = ( mode == Actionable.SIMULATE );
-		List<Pair<Integer, Integer>> extractedList = new ArrayList<>();
-
-
 		for ( int i = 0; i < this.itemHandler.getSlots(); i++ )
 		{
 			ItemStack stackInInventorySlot = this.itemHandler.getStackInSlot( i );
 
-			if( !Platform.itemComparisons().isSameItem( stackInInventorySlot, requestedItemStack ) )
+			if( !request.isSameType( stackInInventorySlot ) )
 			{
 				continue;
 			}
@@ -191,16 +177,10 @@ class ItemHandlerAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<IAE
 					}
 					remainingCurrentSlot -= extracted.getCount();
 				}
-			}
-			while ( !extracted.isEmpty() && remainingCurrentSlot > 0 );
+			} while ( !extracted.isEmpty() && remainingCurrentSlot > 0 );
 
 			remainingSize -= stackSizeCurrentSlot - remainingCurrentSlot;
 
-			if (!gathered.isEmpty())
-			{
-				extractedList.add( Pair.of( i, gathered.getCount() ) );
-			}
-
 			// Done?
 			if( remainingSize <= 0 )
 			{
@@ -210,29 +190,17 @@ class ItemHandlerAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<IAE
 
 		if( !gathered.isEmpty() )
 		{
+			IAEItemStack gatheredAEItemStack = AEItemStack.fromItemStack( gathered );
 			if( mode == Actionable.MODULATE )
 			{
-				if( this.cache.cachedAeStacks.length == 0 )
+				IAEItemStack e = this.cache.currentlyCached.findPrecise( gatheredAEItemStack );
+				if (e != null)
 				{
-					this.cache.update();
-				}
-				else
-				{
-					for( Pair<Integer, Integer> pair : extractedList )
-					{
-						if( this.cache.cachedAeStacks[pair.getKey()] != null )
-						{
-							this.cache.cachedAeStacks[pair.getKey()].decStackSize( pair.getValue() );
-							if( this.cache.cachedAeStacks[pair.getKey()].getStackSize() == 0 )
-							{
-								this.cache.cachedAeStacks[pair.getKey()] = null;
-							}
-						}
-					}
+					e.decStackSize( gathered.getCount() );
 				}
 			}
 
-			return AEItemStack.fromItemStack( gathered );
+			return gatheredAEItemStack;
 		}
 
 		return null;
@@ -286,7 +254,7 @@ class ItemHandlerAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<IAE
 	private void postDifference( Iterable<IAEItemStack> a )
 	{
 		final Iterator<Map.Entry<IMEMonitorHandlerReceiver<IAEItemStack>, Object>> i = this.listeners.entrySet().iterator();
-		while( i.hasNext() )
+		while ( i.hasNext() )
 		{
 			final Map.Entry<IMEMonitorHandlerReceiver<IAEItemStack>, Object> l = i.next();
 			final IMEMonitorHandlerReceiver<IAEItemStack> key = l.getKey();
@@ -301,11 +269,12 @@ class ItemHandlerAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<IAE
 		}
 	}
 
-	private static class InventoryCache
+	private static class InventoryCache implements Iterable<ItemSlot>
 	{
-		private IAEItemStack[] cachedAeStacks = new IAEItemStack[0];
 		private final IItemHandler itemHandler;
 		private final StorageFilter mode;
+		IItemList<IAEItemStack> currentlyCached = AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ).createList();
+
 
 		public InventoryCache( IItemHandler itemHandler, StorageFilter mode )
 		{
@@ -315,106 +284,58 @@ class ItemHandlerAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<IAE
 
 		public IItemList<IAEItemStack> getAvailableItems( IItemList<IAEItemStack> out )
 		{
-			Arrays.stream( this.cachedAeStacks ).forEach( out::add );
+			currentlyCached.iterator().forEachRemaining( out::add );
 			return out;
 		}
 
+		private StorageFilter getMode()
+		{
+			return this.mode;
+		}
+
 		public List<IAEItemStack> update()
 		{
 			final List<IAEItemStack> changes = new ArrayList<>();
-			final int slots = this.itemHandler.getSlots();
 
-			// Make room for new slots
-			if( slots > this.cachedAeStacks.length )
-			{
-				this.cachedAeStacks = Arrays.copyOf( this.cachedAeStacks, slots );
-			}
+			IItemList<IAEItemStack> currentlyOnStorage = AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ).createList();
 
-			for( int slot = 0; slot < slots; slot++ )
+			for ( final ItemSlot is : this )
 			{
-				// Save the old stuff
-				final IAEItemStack oldAeIS = this.cachedAeStacks[slot];
-				ItemStack newIS = this.itemHandler.getStackInSlot( slot );
-				if( this.mode == StorageFilter.EXTRACTABLE_ONLY && !newIS.isEmpty() )
+				final ItemStack newIS = !is.isExtractable() && this.getMode() == StorageFilter.EXTRACTABLE_ONLY ? ItemStack.EMPTY : is.getItemStack();
+				if( !newIS.isEmpty() )
 				{
-					if( this.itemHandler.extractItem( slot, 1, true ).isEmpty() )
-					{
-						newIS = ItemStack.EMPTY;
-					}
+					currentlyOnStorage.add( is.getAEItemStack() );
 				}
-				this.handlePossibleSlotChanges( slot, oldAeIS, newIS, changes );
 			}
 
-			// Handle cases where the number of slots actually is lower now than before
-			if( slots < this.cachedAeStacks.length )
+			for ( final IAEItemStack is : currentlyCached )
 			{
-				for( int slot = slots; slot < this.cachedAeStacks.length; slot++ )
-				{
-					final IAEItemStack aeStack = this.cachedAeStacks[slot];
-
-					if( aeStack != null )
-					{
-						final IAEItemStack a = aeStack.copy();
-						a.setStackSize( -a.getStackSize() );
-						changes.add( a );
-					}
-				}
-
-				// Reduce the cache size
-				this.cachedAeStacks = Arrays.copyOf( this.cachedAeStacks, slots );
+				is.setStackSize( -is.getStackSize() );
 			}
 
+			for ( final IAEItemStack is : currentlyOnStorage )
+			{
+				currentlyCached.add( is );
+			}
+
+			for ( final IAEItemStack is : currentlyCached )
+			{
+				if( is.getStackSize() != 0 )
+				{
+					changes.add( is );
+				}
+			}
+
+			currentlyCached = currentlyOnStorage;
+
 			return changes;
 		}
 
-		private void handlePossibleSlotChanges( int slot, IAEItemStack oldAeIS, ItemStack newIS, List<IAEItemStack> changes )
+		@Override
+		public Iterator<ItemSlot> iterator()
 		{
-			if( oldAeIS != null && oldAeIS.isSameType( newIS ) )
-			{
-				this.handleStackSizeChanged( slot, oldAeIS, newIS, changes );
-			}
-			else
-			{
-				this.handleItemChanged( slot, oldAeIS, newIS, changes );
-			}
+			return new ItemHandlerIterator( this.itemHandler );
 		}
 
-		private void handleStackSizeChanged( int slot, IAEItemStack oldAeIS, ItemStack newIS, List<IAEItemStack> changes )
-		{
-			// Still the same item, but amount might have changed
-			final long diff = newIS.getCount() - oldAeIS.getStackSize();
-
-			if( diff != 0 )
-			{
-				final IAEItemStack stack = oldAeIS.copy();
-				stack.setStackSize( newIS.getCount() );
-
-				this.cachedAeStacks[slot] = stack;
-
-				final IAEItemStack a = stack.copy();
-				a.setStackSize( diff );
-				changes.add( a );
-			}
-		}
-
-		private void handleItemChanged( int slot, IAEItemStack oldAeIS, ItemStack newIS, List<IAEItemStack> changes )
-		{
-			// Completely different item
-			this.cachedAeStacks[slot] = AEItemStack.fromItemStack( newIS );
-
-			// If we had a stack previously in this slot, notify the network about its disappearance
-			if( oldAeIS != null )
-			{
-				oldAeIS.setStackSize( -oldAeIS.getStackSize() );
-				changes.add( oldAeIS );
-			}
-
-			// Notify the network about the new stack. Note that this is null if newIS was null
-			if( this.cachedAeStacks[slot] != null )
-			{
-				changes.add( this.cachedAeStacks[slot] );
-			}
-		}
 	}
-
 }

src/main/java/appeng/parts/misc/ItemRepositoryAdapter.java

@@ -1,16 +1,6 @@
 package appeng.parts.misc;
 
-import java.util.*;
-import java.util.stream.Collectors;
-
-import appeng.api.storage.IStorageChannel;
-
-import appeng.core.AELog;
-import com.jaquadro.minecraft.storagedrawers.api.capabilities.IItemRepository;
-import it.unimi.dsi.fastutil.objects.Object2ObjectMap;
-import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
-import net.minecraft.item.ItemStack;
-
+import javax.annotation.Nullable;
 import appeng.api.AEApi;
 import appeng.api.config.Actionable;
 import appeng.api.networking.security.IActionSource;
@@ -18,15 +8,22 @@ import appeng.api.networking.storage.IBaseMonitor;
 import appeng.api.networking.ticking.TickRateModulation;
 import appeng.api.storage.IMEInventory;
 import appeng.api.storage.IMEMonitorHandlerReceiver;
+import appeng.api.storage.IStorageChannel;
 import appeng.api.storage.channels.IItemStorageChannel;
 import appeng.api.storage.data.IAEItemStack;
 import appeng.api.storage.data.IItemList;
-import appeng.me.GridAccessException;
+import appeng.core.AELog;
 import appeng.me.helpers.IGridProxyable;
 import appeng.me.storage.ITickingMonitor;
 import appeng.util.item.AEItemStack;
+import com.google.common.primitives.Ints;
+import com.jaquadro.minecraft.storagedrawers.api.capabilities.IItemRepository;
+import it.unimi.dsi.fastutil.objects.Object2ObjectMap;
+import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
+import net.minecraft.item.ItemStack;
+
+import java.util.*;
 
-import javax.annotation.Nonnull;
 
 /**
  * Wraps an Item Repository in such a way that it can be used as an IMEInventory for items.
@@ -41,6 +38,7 @@ class ItemRepositoryAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<
     private final IGridProxyable proxyable;
     private final InventoryCache cache;
 
+    private ItemStack stackCache;
 
     ItemRepositoryAdapter( IItemRepository itemRepository, IGridProxyable proxy )
     {
@@ -52,12 +50,29 @@ class ItemRepositoryAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<
     @Override
     public IAEItemStack injectItems( IAEItemStack iox, Actionable type, IActionSource src )
     {
-        ItemStack orgInput = iox.createItemStack();
-        ItemStack remaining = orgInput;
+        // Try to reuse the cached stack
+        @Nullable ItemStack currentCached = stackCache;
+        stackCache = null;
 
-        boolean simulate = ( type == Actionable.SIMULATE );
+        ItemStack orgInput;
+        if( currentCached != null && iox.isSameType( currentCached ) )
+        {
+            // Cache is suitable, just update the count
+            orgInput = currentCached;
+            currentCached.setCount( Ints.saturatedCast( iox.getStackSize() ) );
+        }
+        else
+        {
+            // We need a new stack :-(
+            orgInput = iox.createItemStack();
+        }
+        ItemStack remaining = this.itemRepository.insertItem( orgInput, type == Actionable.SIMULATE );
 
-        remaining = this.itemRepository.insertItem( remaining, simulate );
+        // Store the stack in the cache for next time.
+        if (!remaining.isEmpty() && remaining != orgInput)
+        {
+            stackCache = remaining;
+        }
 
         // At this point, we still have some items left...
         if( remaining == orgInput )
@@ -68,14 +83,9 @@ class ItemRepositoryAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<
 
         if( type == Actionable.MODULATE )
         {
-            try
-            {
-                this.proxyable.getProxy().getTick().alertDevice( this.proxyable.getProxy().getNode() );
-            }
-            catch( GridAccessException ex )
-            {
-                // meh
-            }
+            this.cache
+                    .currentlyCached
+                    .add( AEItemStack.fromItemStack( orgInput ).setStackSize( orgInput.getCount() - remaining.getCount() ) );
         }
 
         return AEItemStack.fromItemStack( remaining );
@@ -85,36 +95,32 @@ class ItemRepositoryAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<
     @Override
     public IAEItemStack extractItems( IAEItemStack request, Actionable mode, IActionSource src )
     {
-        ItemStack requestedItemStack = request.getDefinition();
-        int remainingSize = (int) Math.min( Integer.MAX_VALUE, request.getStackSize());
+        int remainingSize = Ints.saturatedCast( request.getStackSize() );
 
         final boolean simulate = ( mode == Actionable.SIMULATE );
 
-        ItemStack extracted = this.itemRepository.extractItem( requestedItemStack, remainingSize, simulate );
+        ItemStack extracted = this.itemRepository.extractItem( request.getDefinition(), remainingSize, simulate );
 
         if( extracted.getCount() > remainingSize )
         {
             // Something broke. It should never return more than we requested...
             // We're going to silently eat the remainder
-            AELog.warn( "Mod that provided item handler %s is broken. Returned %s items while only requesting %d.",
-                    this.itemRepository.getClass().getName(), extracted.toString(), remainingSize );
+            AELog.warn( "Mod that provided item handler %s is broken. Returned %s items while only requesting %d.", this.itemRepository.getClass().getName(), extracted.toString(), remainingSize );
             extracted.setCount( remainingSize );
         }
 
         if( !extracted.isEmpty() )
         {
+            IAEItemStack extractedAEItemStack = AEItemStack.fromItemStack( extracted );
             if( mode == Actionable.MODULATE )
             {
-                try
+                IAEItemStack e = this.cache.currentlyCached.findPrecise( extractedAEItemStack );
+                if (e != null)
                 {
-                    this.proxyable.getProxy().getTick().alertDevice( this.proxyable.getProxy().getNode() );
-                }
-                catch( GridAccessException ex )
-                {
-                    // meh
+                    e.decStackSize( extracted.getCount() );
                 }
             }
-            return AEItemStack.fromItemStack( extracted );
+            return extractedAEItemStack;
         }
         return null;
     }
@@ -146,7 +152,7 @@ class ItemRepositoryAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<
     private void postDifference( Iterable<IAEItemStack> a )
     {
         final Iterator<Map.Entry<IMEMonitorHandlerReceiver<IAEItemStack>, Object>> i = this.listeners.entrySet().iterator();
-        while( i.hasNext() )
+        while ( i.hasNext() )
         {
             final Map.Entry<IMEMonitorHandlerReceiver<IAEItemStack>, Object> l = i.next();
             final IMEMonitorHandlerReceiver<IAEItemStack> key = l.getKey();
@@ -186,7 +192,7 @@ class ItemRepositoryAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<
 
     private static class InventoryCache
     {
-        private IAEItemStack[] cachedAeStacks = new IAEItemStack[0];
+        private IItemList<IAEItemStack> currentlyCached = AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ).createList();
         private final IItemRepository iItemRepository;
 
         public InventoryCache( IItemRepository iItemRepository )
@@ -196,7 +202,7 @@ class ItemRepositoryAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<
 
         public IItemList<IAEItemStack> getAvailableItems( IItemList<IAEItemStack> out )
         {
-            Arrays.stream( this.cachedAeStacks ).forEach( out::add );
+            currentlyCached.iterator().forEachRemaining( out::add );
             return out;
         }
 
@@ -204,94 +210,31 @@ class ItemRepositoryAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<
         {
             final List<IAEItemStack> changes = new ArrayList<>();
 
-            List<IAEItemStack> out = this.iItemRepository.getAllItems().stream().map( s -> AEItemStack.fromItemStack( s.itemPrototype ).setStackSize( s.count ) ).collect(Collectors.toList() );
+            IItemList<IAEItemStack> currentlyOnStorage = AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ).createList();
+            this.iItemRepository.getAllItems().stream().map( s -> AEItemStack.fromItemStack( s.itemPrototype ).setStackSize( s.count ) ).forEach( currentlyOnStorage::add );
 
-            final int size = out.size();
-
-            // Make room for new slots
-            if( size > this.cachedAeStacks.length )
+            for ( final IAEItemStack is : currentlyCached )
             {
-                this.cachedAeStacks = Arrays.copyOf( this.cachedAeStacks, size );
+                is.setStackSize( -is.getStackSize() );
             }
 
-            for( int x = 0; x < size; x++ )
+            for ( final IAEItemStack is : currentlyOnStorage )
             {
-                // Save the old stuff
-                final IAEItemStack oldAeIS = this.cachedAeStacks[x];
-                final IAEItemStack newIS = out.get( x );
-
-                this.handlePossibleSlotChanges( x, oldAeIS, newIS, changes );
+                currentlyCached.add( is );
             }
 
-            // Handle cases where the number of slots actually is lower now than before
-            if( size < this.cachedAeStacks.length )
+            for ( final IAEItemStack is : currentlyCached )
             {
-                for( int x = 0; x < this.cachedAeStacks.length; x++ )
+                if( is.getStackSize() != 0 )
                 {
-                    final IAEItemStack aeStack = this.cachedAeStacks[x];
-
-                    if( aeStack != null )
-                    {
-                        final IAEItemStack a = aeStack.copy();
-                        a.setStackSize( -a.getStackSize() );
-                        changes.add( a );
-                    }
+                    changes.add( is );
                 }
-
-                // Reduce the cache size
-                this.cachedAeStacks = Arrays.copyOf( this.cachedAeStacks, size );
             }
 
+            currentlyCached = currentlyOnStorage;
+
             return changes;
         }
 
-        private void handlePossibleSlotChanges( int slot, IAEItemStack oldAeIS, IAEItemStack newIS, List<IAEItemStack> changes )
-        {
-            if( oldAeIS != null && oldAeIS.isSameType( newIS ) )
-            {
-                this.handleStackSizeChanged( slot, oldAeIS, newIS, changes );
-            }
-            else
-            {
-                this.handleItemChanged( slot, oldAeIS, newIS, changes );
-            }
-        }
-
-        private void handleStackSizeChanged( int slot, IAEItemStack oldAeIS, IAEItemStack newIS, List<IAEItemStack> changes )
-        {
-            // Still the same item, but amount might have changed
-            final long diff = newIS.getStackSize() - oldAeIS.getStackSize();
-
-            if( diff != 0 )
-            {
-                final IAEItemStack stack = oldAeIS.copy();
-                stack.setStackSize( newIS.getStackSize() );
-
-                this.cachedAeStacks[slot] = stack;
-
-                final IAEItemStack a = stack.copy();
-                a.setStackSize( diff );
-                changes.add( a );
-            }
-        }
-
-        private void handleItemChanged( int slot, IAEItemStack oldAeIS, IAEItemStack newIS, List<IAEItemStack> changes )
-        {
-            // Completely different item
-            this.cachedAeStacks[slot] =  newIS ;
-
-            // If we had a stack previously in this slot, notify the network about its disappearance
-            if( oldAeIS != null )
-            {
-                oldAeIS.setStackSize( -oldAeIS.getStackSize() );
-                changes.add( oldAeIS );
-            }
-
-            // Notify the network about the new stack. Note that this is null if newIS was null
-            if( this.cachedAeStacks[slot] != null )
-            {
-                changes.add( this.cachedAeStacks[slot] );
-            }
-        }
     }
 }

src/main/java/appeng/parts/misc/PartStorageBus.java

@@ -258,20 +258,17 @@ public class PartStorageBus extends PartUpgradeable implements IGridTickable, IC
 	@Override
 	public void postChange( final IBaseMonitor<IAEItemStack> monitor, final Iterable<IAEItemStack> change, final IActionSource source )
 	{
-		if( source == this.mySrc || source.machine().map( machine -> machine == this ).orElse( false ) )
+		try
 		{
-			try
+			if( this.getProxy().isActive() )
 			{
-				if( this.getProxy().isActive() )
-				{
-					this.getProxy().getStorage().postAlterationOfStoredItems( AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ), change, this.mySrc );
-				}
-			}
-			catch( final GridAccessException e )
-			{
-				// :(
+				this.getProxy().getStorage().postAlterationOfStoredItems( AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ), change, this.mySrc );
 			}
 		}
+		catch( final GridAccessException e )
+		{
+			// :(
+		}
 	}
 
 	@Override
@@ -598,7 +595,7 @@ public class PartStorageBus extends PartUpgradeable implements IGridTickable, IC
 	{
 		if( channel == AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ) )
 		{
-			final IMEInventoryHandler<IAEItemStack> out = this.getProxy().isActive() ? this.getInternalHandler() : null;
+			final IMEInventoryHandler<IAEItemStack> out = this.getInternalHandler();
 			if( out != null )
 			{
 				return Collections.singletonList( out );

src/main/java/appeng/parts/p2p/PartP2PFEPower.java

@@ -19,11 +19,12 @@
 package appeng.parts.p2p;
 
 
-import java.util.List;
+import java.util.*;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
+import appeng.me.cache.helpers.TunnelCollection;
 import net.minecraft.item.ItemStack;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraftforge.common.capabilities.Capability;
@@ -42,6 +43,7 @@ public class PartP2PFEPower extends PartP2PTunnel<PartP2PFEPower>
 	private static final IEnergyStorage NULL_ENERGY_STORAGE = new NullEnergyStorage();
 	private final IEnergyStorage inputHandler = new InputEnergyStorage();
 	private final IEnergyStorage outputHandler = new OutputEnergyStorage();
+	private final Queue<PartP2PFEPower> outputs = new ArrayDeque<>();
 
 	public PartP2PFEPower( ItemStack is )
 	{
@@ -108,6 +110,8 @@ public class PartP2PFEPower extends PartP2PTunnel<PartP2PFEPower>
 
 	private class InputEnergyStorage implements IEnergyStorage
 	{
+		private boolean iteratingOutputs;
+
 		@Override
 		public int extractEnergy( int maxExtract, boolean simulate )
 		{
@@ -131,8 +135,14 @@ public class PartP2PFEPower extends PartP2PTunnel<PartP2PFEPower>
 				final int amountPerOutput = maxReceive / outputTunnels;
 				int overflow = amountPerOutput == 0 ? maxReceive : maxReceive % amountPerOutput;
 
-				for( PartP2PFEPower target : PartP2PFEPower.this.getOutputs() )
+				if (outputs.isEmpty())
 				{
+					for ( PartP2PFEPower o : PartP2PFEPower.this.getOutputs())
+					outputs.add( o );
+				}
+
+				while ( !outputs.isEmpty() ) {
+					PartP2PFEPower target = outputs.poll();
 					final IEnergyStorage output = target.getAttachedEnergyStorage();
 					final int toSend = amountPerOutput + overflow;
 					final int received = output.receiveEnergy( toSend, simulate );

src/main/java/appeng/parts/reporting/AbstractPartMonitor.java

@@ -21,10 +21,12 @@ package appeng.parts.reporting;
 
 import java.io.IOException;
 
+import appeng.api.networking.events.MENetworkChannelsChanged;
+import appeng.api.networking.events.MENetworkEventSubscribe;
+import appeng.api.networking.events.MENetworkPowerStatusChange;
 import appeng.api.storage.channels.IFluidStorageChannel;
 import appeng.api.storage.data.IAEFluidStack;
 import appeng.fluids.util.AEFluidStack;
-import appeng.util.item.AEStack;
 import io.netty.buffer.ByteBuf;
 
 import net.minecraft.client.renderer.GlStateManager;
@@ -43,7 +45,6 @@ import net.minecraftforge.fml.relauncher.SideOnly;
 
 import appeng.api.AEApi;
 import appeng.api.implementations.parts.IPartStorageMonitor;
-import appeng.api.networking.security.IActionSource;
 import appeng.api.networking.storage.IStackWatcher;
 import appeng.api.networking.storage.IStackWatcherHost;
 import appeng.api.parts.IPartModel;
@@ -52,7 +53,6 @@ import appeng.api.storage.IStorageChannel;
 import appeng.api.storage.channels.IItemStorageChannel;
 import appeng.api.storage.data.IAEItemStack;
 import appeng.api.storage.data.IAEStack;
-import appeng.api.storage.data.IItemList;
 import appeng.client.render.TesrRenderHelper;
 import appeng.core.localization.PlayerMessages;
 import appeng.helpers.Reflected;
@@ -385,19 +385,87 @@ public abstract class AbstractPartMonitor extends AbstractPartDisplay implements
 		this.configureWatchers();
 	}
 
+	@MENetworkEventSubscribe
+	public void powerStatusChange( final MENetworkPowerStatusChange ev )
+	{
+		if( !this.getProxy().isPowered() )
+		{
+			if( this.myWatcher != null )
+			{
+				if( this.configuredItem != null )
+				{
+					this.configuredItem.setStackSize( 0 );
+				}
+				if( this.configuredFluid != null )
+				{
+					this.configuredFluid.setStackSize( 0 );
+				}
+			}
+		}
+		else
+		{
+			try
+			{
+				if( this.configuredItem != null )
+				{
+					this.updateReportingValue( this.getProxy().getStorage().getInventory( AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ) ) );
+				}
+				if( this.configuredFluid != null )
+				{
+					this.updateReportingValue( this.getProxy().getStorage().getInventory( AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ) ) );
+				}
+			}
+			catch( final GridAccessException e )
+			{
+				// ;P
+			}
+		}
+	}
+
+	@MENetworkEventSubscribe
+	public void channelChanged( final MENetworkChannelsChanged c )
+	{
+		if( !this.getProxy().isPowered() )
+		{
+			if( this.myWatcher != null )
+			{
+				if( this.configuredItem != null )
+				{
+					this.configuredItem.setStackSize( 0 );
+				}
+				if( this.configuredFluid != null )
+				{
+					this.configuredFluid.setStackSize( 0 );
+				}
+			}
+		}
+		else
+		{
+			try
+			{
+				if( this.configuredItem != null )
+				{
+					this.updateReportingValue( this.getProxy().getStorage().getInventory( AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ) ) );
+				}
+				if( this.configuredFluid != null )
+				{
+					this.updateReportingValue( this.getProxy().getStorage().getInventory( AEApi.instance().storage().getStorageChannel( IFluidStorageChannel.class ) ) );
+				}
+			}
+			catch( final GridAccessException e )
+			{
+				// ;P
+			}
+		}
+	}
+
 	@Override
-	public void onStackChange( final IItemList o, final IAEStack fullStack, final IAEStack diffStack, final IActionSource src, final IStorageChannel chan )
+	public void onStackChange( final IAEStack diffStack, final IStorageChannel chan )
 	{
 		if( this.configuredItem != null )
 		{
-			if( fullStack == null )
-			{
-				this.configuredItem.setStackSize( 0 );
-			}
-			else
-			{
-				this.configuredItem.setStackSize( fullStack.getStackSize() );
-			}
+			long diff = this.configuredItem.getStackSize() + diffStack.getStackSize();
+			this.configuredItem.setStackSize( diff >= 0 ? this.configuredItem.getStackSize() + diffStack.getStackSize() : 0 );
 
 			final long stackSize = this.configuredItem.getStackSize();
 			final String humanReadableText = NUMBER_CONVERTER.toWideReadableForm( stackSize );
@@ -410,14 +478,8 @@ public abstract class AbstractPartMonitor extends AbstractPartDisplay implements
 		}
 		else if( this.configuredFluid != null )
 		{
-			if( fullStack == null )
-			{
-				this.configuredFluid.setStackSize( 0 );
-			}
-			else
-			{
-				this.configuredFluid.setStackSize( fullStack.getStackSize() );
-			}
+			long diff = this.configuredFluid.getStackSize() + diffStack.getStackSize();
+			this.configuredFluid.setStackSize( diff >= 0 ? this.configuredFluid.getStackSize() + diffStack.getStackSize() : 0 );
 
 			final long stackSize = this.configuredFluid.getStackSize() / 1000;
 			final String humanReadableText = NUMBER_CONVERTER.toWideReadableForm( stackSize ) + "B";

src/main/java/appeng/tile/inventory/AppEngInternalInventory.java

@@ -206,7 +206,7 @@ public class AppEngInternalInventory extends ItemStackHandler implements Iterabl
 		this.enableClientEvents = enableClientEvents;
 	}
 
-	private IAEAppEngInventory getTileEntity()
+	public IAEAppEngInventory getTileEntity()
 	{
 		return this.te;
 	}

src/main/java/appeng/tile/misc/TileInterface.java

@@ -164,6 +164,7 @@ public class TileInterface extends AENetworkInvTile implements IGridTickable, II
 
 		super.onReady();
 		this.duality.initialize();
+		this.getProxy().setIdlePowerUsage( Math.pow( 4, ( this.getInstalledUpgrades( Upgrades.PATTERN_EXPANSION ) ) ) );
 	}
 
 	@Override

src/main/java/appeng/tile/storage/TileIOPort.java

@@ -425,6 +425,7 @@ public class TileIOPort extends AENetworkInvTile implements IUpgradeableHost, IC
 						if( extracted != null )
 						{
 							possible = extracted.getStackSize();
+							extracted.setCraftable( false );
 							final IAEStack failed = Platform.poweredInsert( energy, destination, extracted, this.mySrc );
 
 							if( failed != null )

src/main/java/appeng/util/Platform.java

@@ -1246,18 +1246,20 @@ public class Platform
 				if( itemToAdd < input.getStackSize() )
 				{
 					final long original = input.getStackSize();
+					final T leftover = input.copy();
 					final T split = input.copy();
-					split.decStackSize( itemToAdd );
-					input.setStackSize( itemToAdd );
-					split.add( cell.injectItems( input, Actionable.MODULATE, src ) );
+
+					leftover.decStackSize(itemToAdd);
+					split.setStackSize(itemToAdd);
+					leftover.add(cell.injectItems(split, Actionable.MODULATE, src));
 
 					src.player().ifPresent( player ->
 					{
-						final long diff = original - split.getStackSize();
+						final long diff = original - leftover.getStackSize();
 						Stats.ItemsInserted.addToPlayer( player, (int) diff );
 					} );
 
-					return split;
+					return leftover;
 				}
 
 				final T ret = cell.injectItems( input, Actionable.MODULATE, src );

src/main/java/appeng/util/ReadOnlyCollection.java

@@ -56,6 +56,6 @@ public class ReadOnlyCollection<T> implements IReadOnlyCollection<T>
 	@Override
 	public boolean contains( final Object node )
 	{
-		return this.c.contains( node );
+		return this.c.contains( (T) node );
 	}
 }

src/main/java/appeng/util/inv/ItemHandlerIterator.java

@@ -52,7 +52,7 @@ public class ItemHandlerIterator implements Iterator<ItemSlot>
 		{
 			throw new NoSuchElementException();
 		}
-		this.itemSlot.setExtractable( !this.itemHandler.extractItem( this.slot, 1, true ).isEmpty() );
+		this.itemSlot.setExtractable( !this.itemHandler.extractItem( this.slot, Integer.MAX_VALUE, true ).isEmpty() );
 		this.itemSlot.setItemStack( this.itemHandler.getStackInSlot( this.slot ) );
 		this.itemSlot.setSlot( this.slot );
 		this.slot++;

src/main/java/appeng/util/item/AEItemStack.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of Applied Energistics 2.
- * Copyright (c) 2013 - 2014, AlgorithmX2, All rights reserved.
+ * Copyright (c) 2013 - 2020, AlgorithmX2, All rights reserved.
  *
  * Applied Energistics 2 is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by
@@ -18,7 +18,6 @@
 
 package appeng.util.item;
 
-
 import java.util.List;
 import java.util.Objects;
 import java.util.Optional;
@@ -27,347 +26,294 @@ import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
 import io.netty.buffer.ByteBuf;
-
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NBTTagCompound;
-import net.minecraft.util.ResourceLocation;
 import net.minecraftforge.fml.common.network.ByteBufUtils;
 import net.minecraftforge.fml.relauncher.Side;
 import net.minecraftforge.fml.relauncher.SideOnly;
 import net.minecraftforge.items.ItemHandlerHelper;
 
-import appeng.api.AEApi;
 import appeng.api.config.FuzzyMode;
 import appeng.api.storage.IStorageChannel;
 import appeng.api.storage.channels.IItemStorageChannel;
 import appeng.api.storage.data.IAEItemStack;
+import appeng.core.Api;
 import appeng.util.Platform;
 
+public final class AEItemStack extends AEStack<IAEItemStack> implements IAEItemStack {
+    private static final String NBT_STACKSIZE = "Cnt";
+    private static final String NBT_REQUESTABLE = "Req";
+    private static final String NBT_CRAFTABLE = "Craft";
 
-public final class AEItemStack extends AEStack<IAEItemStack> implements IAEItemStack
-{
-	private AESharedItemStack sharedStack;
-	private Optional<OreReference> oreReference;
+    private final AESharedItemStack sharedStack;
+    private Optional<OreReference> oreReference;
 
-	@SideOnly( Side.CLIENT )
-	private String displayName;
-	@SideOnly( Side.CLIENT )
-	private List<String> tooltip;
-	@SideOnly( Side.CLIENT )
-	private ResourceLocation uniqueID;
+    @SideOnly(Side.CLIENT)
+    private String displayName;
+    @SideOnly(Side.CLIENT)
+    private List<String> tooltip;
 
-	private AEItemStack( final AEItemStack is )
-	{
-		this.setStackSize( is.getStackSize() );
-		this.setCraftable( is.isCraftable() );
-		this.setCountRequestable( is.getCountRequestable() );
-		this.sharedStack = is.sharedStack;
-		this.oreReference = is.oreReference;
-	}
+    private AEItemStack(final AEItemStack is) {
+        this.setStackSize(is.getStackSize());
+        this.setCraftable(is.isCraftable());
+        this.setCountRequestable(is.getCountRequestable());
+        this.sharedStack = is.sharedStack;
+        this.oreReference = is.oreReference;
+    }
 
-	private AEItemStack( final AESharedItemStack is, long size )
-	{
-		this.sharedStack = is;
-		this.setStackSize( size );
-		this.setCraftable( false );
-		this.setCountRequestable( 0 );
-		this.oreReference = OreHelper.INSTANCE.getOre( is.getDefinition() );
-	}
+    private AEItemStack(final AESharedItemStack is, long size) {
+        this.sharedStack = is;
+        this.setStackSize(size);
+        this.setCraftable(false);
+        this.setCountRequestable(0);
+        this.oreReference = OreHelper.INSTANCE.getOre( is.getDefinition() );
+    }
 
-	@Nullable
-	public static AEItemStack fromItemStack( @Nonnull final ItemStack stack )
-	{
-		if( stack.isEmpty() )
-		{
-			return null;
-		}
+    @Nullable
+    public static AEItemStack fromItemStack(@Nonnull final ItemStack stack) {
+        if (stack.isEmpty()) {
+            return null;
+        }
 
-		return new AEItemStack( AEItemStackRegistry.getRegisteredStack( stack ), stack.getCount() );
-	}
+        return new AEItemStack(AEItemStackRegistry.getRegisteredStack(stack), stack.getCount());
+    }
 
-	public static IAEItemStack fromNBT( final NBTTagCompound i )
-	{
-		if( i == null )
-		{
-			return null;
-		}
+    public static IAEItemStack fromNBT( final NBTTagCompound i )
+    {
+        if( i == null )
+        {
+            return null;
+        }
 
-		final ItemStack itemstack = new ItemStack( i );
-		if( itemstack.isEmpty() )
-		{
-			return null;
-		}
+        final ItemStack itemstack = new ItemStack( i );
+        if( itemstack.isEmpty() )
+        {
+            return null;
+        }
 
-		final AEItemStack item = AEItemStack.fromItemStack( itemstack );
-		item.setStackSize( i.getLong( "Cnt" ) );
-		item.setCountRequestable( i.getLong( "Req" ) );
-		item.setCraftable( i.getBoolean( "Craft" ) );
-		return item;
-	}
+        final AEItemStack item = AEItemStack.fromItemStack( itemstack );
 
-	@Override
-	public void writeToNBT( final NBTTagCompound i )
-	{
-		this.getDefinition().writeToNBT( i );
-		i.setLong( "Cnt", this.getStackSize() );
-		i.setLong( "Req", this.getCountRequestable() );
-		i.setBoolean( "Craft", this.isCraftable() );
-	}
+        item.setStackSize(i.getLong(NBT_STACKSIZE));
+        item.setCountRequestable(i.getLong(NBT_REQUESTABLE));
+        item.setCraftable(i.getBoolean(NBT_CRAFTABLE));
+        return item;
+    }
 
-	public static AEItemStack fromPacket( final ByteBuf data )
-	{
-		final byte mask = data.readByte();
-		final byte stackType = (byte) ( ( mask & 0x0C ) >> 2 );
-		final byte countReqType = (byte) ( ( mask & 0x30 ) >> 4 );
-		final boolean isCraftable = ( mask & 0x40 ) > 0;
+    @Override
+    public void writeToNBT(final NBTTagCompound i) {
+        this.getDefinition().writeToNBT( i );
 
-		final ItemStack itemstack = new ItemStack( ByteBufUtils.readTag( data ) );
-		final long stackSize = getPacketValue( stackType, data );
-		final long countRequestable = getPacketValue( countReqType, data );
+        i.setLong(NBT_STACKSIZE, this.getStackSize());
+        i.setLong(NBT_REQUESTABLE, this.getCountRequestable());
+        i.setBoolean(NBT_CRAFTABLE, this.isCraftable());
+    }
 
-		if( itemstack.isEmpty() )
-		{
-			return null;
-		}
+    public static AEItemStack fromPacket( final ByteBuf data )
+    {
+        final byte mask = data.readByte();
+        final byte stackType = (byte) ( ( mask & 0x0C ) >> 2 );
+        final byte countReqType = (byte) ( ( mask & 0x30 ) >> 4 );
+        final boolean isCraftable = ( mask & 0x40 ) > 0;
 
-		final AEItemStack item = new AEItemStack( AEItemStackRegistry.getRegisteredStack( itemstack ), stackSize );
-		item.setCountRequestable( countRequestable );
-		item.setCraftable( isCraftable );
-		return item;
-	}
+        final ItemStack itemstack = new ItemStack( ByteBufUtils.readTag( data ) );
+        final long stackSize = getPacketValue( stackType, data );
+        final long countRequestable = getPacketValue( countReqType, data );
 
-	@Override
-	public void writeToPacket( final ByteBuf i )
-	{
-		final byte mask = (byte) ( ( this.getType( this.getStackSize() ) << 2 ) | ( this
-				.getType( this.getCountRequestable() ) << 4 ) | ( (byte) ( this.isCraftable() ? 1 : 0 ) << 6 ) | ( this.hasTagCompound() ? 1 : 0 ) << 7 );
+        if( itemstack.isEmpty() )
+        {
+            return null;
+        }
 
-		i.writeByte( mask );
-		ByteBufUtils.writeTag( i, this.getDefinition().serializeNBT() );
-		this.putPacketValue( i, this.getStackSize() );
-		this.putPacketValue( i, this.getCountRequestable() );
-	}
+        final AEItemStack item = new AEItemStack( AEItemStackRegistry.getRegisteredStack( itemstack ), stackSize );
+        item.setCountRequestable( countRequestable );
+        item.setCraftable( isCraftable );
+        return item;
+    }
 
-	@Override
-	public void add( final IAEItemStack option )
-	{
-		if( option == null )
-		{
-			return;
-		}
+    @Override
+    public void writeToPacket( final ByteBuf i )
+    {
+        final byte mask = (byte) ( ( this.getType( this.getStackSize() ) << 2 ) | ( this
+                .getType( this.getCountRequestable() ) << 4 ) | ( (byte) ( this.isCraftable() ? 1 : 0 ) << 6 ) | ( this.hasTagCompound() ? 1 : 0 ) << 7 );
 
-		this.incStackSize( option.getStackSize() );
-		this.setCountRequestable( this.getCountRequestable() + option.getCountRequestable() );
-		this.setCraftable( this.isCraftable() || option.isCraftable() );
-	}
+        i.writeByte( mask );
+        ByteBufUtils.writeTag( i, this.getDefinition().serializeNBT() );
+        this.putPacketValue( i, this.getStackSize() );
+        this.putPacketValue( i, this.getCountRequestable() );
+    }
 
-	@Override
-	public boolean fuzzyComparison( final IAEItemStack other, final FuzzyMode mode )
-	{
-		if( mode == FuzzyMode.IGNORE_ALL && OreHelper.INSTANCE.sameOre( this, other ) )
-		{
-			return true;
-		}
+    @Override
+    public void add(final IAEItemStack option) {
+        if (option == null) {
+            return;
+        }
 
-		final ItemStack itemStack = this.getDefinition();
-		final ItemStack otherStack = other.getDefinition();
+        this.incStackSize(option.getStackSize());
+        this.setCountRequestable(this.getCountRequestable() + option.getCountRequestable());
+        this.setCraftable(this.isCraftable() || option.isCraftable());
+    }
 
-		return this.fuzzyItemStackComparison( itemStack, otherStack, mode );
-	}
+    @Override
+    public boolean fuzzyComparison(final IAEItemStack other, final FuzzyMode mode) {
+        final ItemStack itemStack = this.getDefinition();
+        final ItemStack otherStack = other.getDefinition();
 
-	@Override
-	public IAEItemStack copy()
-	{
-		return new AEItemStack( this );
-	}
+        return this.fuzzyItemStackComparison(itemStack, otherStack, mode);
+    }
 
-	@Override
-	public boolean isItem()
-	{
-		return true;
-	}
+    @Override
+    public IAEItemStack copy() {
+        return new AEItemStack(this);
+    }
 
-	@Override
-	public boolean isFluid()
-	{
-		return false;
-	}
+    @Override
+    public boolean isItem()
+    {
+        return true;
+    }
 
-	@Override
-	public IStorageChannel<IAEItemStack> getChannel()
-	{
-		return AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class );
-	}
+    @Override
+    public boolean isFluid()
+    {
+        return false;
+    }
 
-	@Override
-	public ItemStack createItemStack()
-	{
-		return ItemHandlerHelper.copyStackWithSize( this.getDefinition(), (int) Math.min( Integer.MAX_VALUE, this.getStackSize() ) );
-	}
+    @Override
+    public IStorageChannel<IAEItemStack> getChannel() {
+        return Api.INSTANCE.storage().getStorageChannel(IItemStorageChannel.class);
+    }
 
-	@Override
-	public Item getItem()
-	{
-		return this.getDefinition().getItem();
-	}
+    @Override
+    public ItemStack createItemStack() {
+        return ItemHandlerHelper.copyStackWithSize(this.getDefinition(),
+                (int) Math.min(Integer.MAX_VALUE, this.getStackSize()));
+    }
 
-	@Override
-	public int getItemDamage()
-	{
-		return this.sharedStack.getItemDamage();
-	}
+    @Override
+    public Item getItem() {
+        return this.getDefinition().getItem();
+    }
 
-	@Override
-	public boolean sameOre( final IAEItemStack is )
-	{
-		return OreHelper.INSTANCE.sameOre( this, is );
-	}
+    @Override
+    public int getItemDamage() {
+        return this.sharedStack.getItemDamage();
+    }
 
-	@Override
-	public boolean isSameType( final IAEItemStack otherStack )
-	{
-		if( otherStack == null )
-		{
-			return false;
-		}
+    @Override
+    public boolean sameOre( final IAEItemStack is )
+    {
+        return OreHelper.INSTANCE.sameOre( this, is );
+    }
 
-		return Objects.equals( this.sharedStack, ( (AEItemStack) otherStack ).sharedStack );
-	}
+    @Override
+    public boolean isSameType(final IAEItemStack otherStack) {
+        if (otherStack == null) {
+            return false;
+        }
 
-	@Override
-	public boolean isSameType( final ItemStack otherStack )
-	{
-		if( otherStack.isEmpty() )
-		{
-			return false;
-		}
-		int oldSize = otherStack.getCount();
+        return Objects.equals(this.sharedStack, ((AEItemStack) otherStack).sharedStack);
+    }
 
-		otherStack.setCount( 1 );
-		boolean ret = ItemStack.areItemStacksEqual( this.getDefinition(), otherStack );
-		otherStack.setCount( oldSize );
+    @Override
+    public boolean isSameType(final ItemStack otherStack) {
+        if (otherStack.isEmpty()) {
+            return false;
+        }
+        int oldSize = otherStack.getCount();
 
-		return ret;
-	}
+        otherStack.setCount(1);
+        boolean ret = ItemStack.areItemStacksEqual(this.getDefinition(), otherStack);
+        otherStack.setCount(oldSize);
 
-	@Override
-	public int hashCode()
-	{
-		return this.sharedStack.hashCode();
-	}
+        return ret;
+    }
 
-	@Override
-	public boolean equals( final Object ia )
-	{
-		if( ia instanceof AEItemStack )
-		{
-			return this.isSameType( (AEItemStack) ia );
-		}
-		else if( ia instanceof ItemStack )
-		{
-			return this.isSameType( (ItemStack) ia );
-		}
-		return false;
-	}
+    @Override
+    public int hashCode() {
+        return this.sharedStack.hashCode();
+    }
 
-	@Override
-	public String toString()
-	{
-		return this.getStackSize() + "x" + this.getDefinition().getItem().getUnlocalizedName() + "@" + this.getDefinition().getItemDamage();
-	}
+    @Override
+    public boolean equals(final Object ia) {
+        if (ia instanceof AEItemStack) {
+            return this.isSameType((AEItemStack) ia);
+        } else if (ia instanceof ItemStack) {
+            // this actually breaks the equals contract (being equals to unrelated classes)
+            return equals((ItemStack) ia);
+        }
+        return false;
+    }
 
-	@SideOnly( Side.CLIENT )
-	public List<String> getToolTip()
-	{
-		if( this.tooltip == null )
-		{
-			this.tooltip = Platform.getTooltip( this.asItemStackRepresentation() );
-		}
-		return this.tooltip;
-	}
+    @Override
+    public boolean equals(final ItemStack is) {
+        return this.isSameType(is);
+    }
 
-	@SideOnly( Side.CLIENT )
-	public String getDisplayName()
-	{
-		if( this.displayName == null )
-		{
-			this.displayName = Platform.getItemDisplayName( this.asItemStackRepresentation() );
-		}
-		return this.displayName;
-	}
+    @Override
+    public String toString() {
+        return this.getStackSize() + "x" + this.getDefinition().getItem().getRegistryName();
+    }
 
-	@SideOnly( Side.CLIENT )
-	public String getModID()
-	{
-		if( this.uniqueID == null )
-		{
-			this.uniqueID = Item.REGISTRY.getNameForObject( this.getDefinition().getItem() );
-		}
+    @SideOnly(Side.CLIENT)
+    public List<String> getToolTip() {
+        if (this.tooltip == null) {
+            this.tooltip = Platform.getTooltip(this.asItemStackRepresentation());
+        }
+        return this.tooltip;
+    }
 
-		if( this.uniqueID == null )
-		{
-			return "** Null";
-		}
+    @SideOnly(Side.CLIENT)
+    public String getDisplayName() {
+        if (this.displayName == null) {
+            this.displayName = Platform.getItemDisplayName(this.asItemStackRepresentation());
+        }
+        return this.displayName;
+    }
 
-		return this.uniqueID.getResourceDomain() == null ? "** Null" : this.uniqueID.getResourceDomain();
-	}
+    @SideOnly(Side.CLIENT)
+    public String getModID() {
+        return this.getDefinition().getItem().getRegistryName().getResourceDomain();
+    }
 
-	public Optional<OreReference> getOre()
-	{
-		return this.oreReference;
-	}
+    public Optional<OreReference> getOre()
+    {
+        return this.oreReference;
+    }
 
-	@Override
-	public boolean hasTagCompound()
-	{
-		return this.getDefinition().hasTagCompound();
-	}
+    @Override
+    public boolean hasTagCompound() {
+        return this.getDefinition().hasTagCompound();
+    }
 
-	@Override
-	public ItemStack asItemStackRepresentation()
-	{
-		return this.getDefinition().copy();
-	}
+    @Override
+    public ItemStack asItemStackRepresentation() {
+        return this.getDefinition().copy();
+    }
 
-	@Override
-	public ItemStack getDefinition()
-	{
-		return this.sharedStack.getDefinition();
-	}
+    @Override
+    public ItemStack getDefinition() {
+        return this.sharedStack.getDefinition();
+    }
 
-	AESharedItemStack getSharedStack()
-	{
-		return this.sharedStack;
-	}
+    AESharedItemStack getSharedStack() {
+        return this.sharedStack;
+    }
 
-	private boolean fuzzyItemStackComparison( ItemStack a, ItemStack b, FuzzyMode mode )
-	{
-		if( a.getItem() == b.getItem() )
-		{
-			if( a.getItem().isDamageable() )
-			{
-				if( mode == FuzzyMode.IGNORE_ALL )
-				{
-					return true;
-				}
-				else if( mode == FuzzyMode.PERCENT_99 )
-				{
-					return ( a.getItemDamage() > 1 ) == ( b.getItemDamage() > 1 );
-				}
-				else
-				{
-					final float percentDamageOfA = (float) a.getItemDamage() / (float) a.getMaxDamage();
-					final float percentDamageOfB = (float) b.getItemDamage() / (float) b.getMaxDamage();
+    private boolean fuzzyItemStackComparison(ItemStack a, ItemStack b, FuzzyMode mode) {
+        if (a.getItem() == b.getItem() && a.getItem().isDamageable()) {
+            if (mode == FuzzyMode.IGNORE_ALL) {
+                return true;
+            } else if (mode == FuzzyMode.PERCENT_99) {
+                return a.getItemDamage() > 1 == b.getItemDamage() > 1;
+            } else {
+                final float percentDamageOfA = (float) a.getItemDamage() / a.getMaxDamage();
+                final float percentDamageOfB = (float) b.getItemDamage() / b.getMaxDamage();
 
-					return ( percentDamageOfA > mode.breakPoint ) == ( percentDamageOfB > mode.breakPoint );
-				}
-			}
-
-			return a.getMetadata() == b.getMetadata();
-		}
-
-		return false;
-	}
+                return percentDamageOfA > mode.breakPoint == percentDamageOfB > mode.breakPoint;
+            }
+        }
 
+        return false;
+    }
 }

src/main/java/appeng/util/item/AEItemStackRegistry.java

@@ -23,7 +23,6 @@
 
 package appeng.util.item;
 
-
 import java.lang.ref.WeakReference;
 import java.util.WeakHashMap;
 
@@ -31,56 +30,34 @@ import javax.annotation.Nonnull;
 
 import net.minecraft.item.ItemStack;
 
-import appeng.util.Platform;
+public final class AEItemStackRegistry {
+    private static final WeakHashMap<AESharedItemStack, WeakReference<AESharedItemStack>> REGISTRY = new WeakHashMap<>();
 
+    private AEItemStackRegistry() {
+    }
 
-public final class AEItemStackRegistry
-{
-	private static final WeakHashMap<AESharedItemStack, WeakReference<AESharedItemStack>> SERVER_REGISTRY = new WeakHashMap<>();
-	private static final WeakHashMap<AESharedItemStack, WeakReference<AESharedItemStack>> CLIENT_REGISTRY = new WeakHashMap<>();
+    static synchronized AESharedItemStack getRegisteredStack(final @Nonnull ItemStack itemStack) {
+        if (itemStack.isEmpty()) {
+            throw new IllegalArgumentException("stack cannot be empty");
+        }
 
-	private AEItemStackRegistry()
-	{
-	}
+        int oldStackSize = itemStack.getCount();
+        itemStack.setCount(1);
 
-	private static WeakHashMap<AESharedItemStack, WeakReference<AESharedItemStack>> registry()
-	{
-		if( Platform.isClient() )
-		{
-			return CLIENT_REGISTRY;
-		}
-		else
-		{
-			return SERVER_REGISTRY;
-		}
-	}
+        AESharedItemStack search = new AESharedItemStack(itemStack);
+        WeakReference<AESharedItemStack> weak = REGISTRY.get(search);
+        AESharedItemStack ret = null;
 
-	static synchronized AESharedItemStack getRegisteredStack( final @Nonnull ItemStack itemStack )
-	{
-		if( itemStack.isEmpty() )
-		{
-			throw new IllegalArgumentException( "stack cannot be empty" );
-		}
+        if (weak != null) {
+            ret = weak.get();
+        }
 
-		int oldStackSize = itemStack.getCount();
-		itemStack.setCount( 1 );
+        if (ret == null) {
+            ret = new AESharedItemStack(itemStack.copy());
+            REGISTRY.put(ret, new WeakReference<>(ret));
+        }
+        itemStack.setCount(oldStackSize);
 
-		AESharedItemStack search = new AESharedItemStack( itemStack );
-		WeakReference<AESharedItemStack> weak = registry().get( search );
-		AESharedItemStack ret = null;
-
-		if( weak != null )
-		{
-			ret = weak.get();
-		}
-
-		if( ret == null )
-		{
-			ret = new AESharedItemStack( itemStack.copy() );
-			registry().put( ret, new WeakReference<>( ret ) );
-		}
-		itemStack.setCount( oldStackSize );
-
-		return ret;
-	}
+        return ret;
+    }
 }

src/main/java/appeng/util/item/AESharedItemStack.java

@@ -18,263 +18,76 @@
 
 package appeng.util.item;
 
-
 import java.util.Objects;
 
 import com.google.common.base.Preconditions;
 
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
-import net.minecraft.nbt.NBTTagCompound;
 
-import appeng.api.config.FuzzyMode;
+final class AESharedItemStack {
 
+    private final ItemStack itemStack;
+    private final int itemId;
+    private final int itemDamage;
+    private final int hashCode;
 
-final class AESharedItemStack implements Comparable<AESharedItemStack>
-{
-	private static final NBTTagCompound LOW_TAG = new NBTTagCompound();
-	private static final NBTTagCompound HIGH_TAG = new NBTTagCompound();
+    public AESharedItemStack(final ItemStack itemStack) {
+        this(itemStack, itemStack.getItemDamage());
+    }
 
-	private final ItemStack itemStack;
-	private final int itemId;
-	private final int itemDamage;
-	private final int hashCode;
+    /**
+     * A constructor to explicitly set the damage value and not fetch it from the {@link ItemStack}
+     *
+     * @param itemStack The {@link ItemStack} to filter
+     * @param damage    The damage of the item
+     */
+    private AESharedItemStack(ItemStack itemStack, int damage) {
+        this.itemStack = itemStack;
+        this.itemId = Item.getIdFromItem(itemStack.getItem());
+        this.itemDamage = damage;
 
-	public AESharedItemStack( final ItemStack itemStack )
-	{
-		this.itemStack = itemStack;
-		this.itemId = Item.getIdFromItem( itemStack.getItem() );
-		this.itemDamage = itemStack.getItemDamage();
-		this.hashCode = this.makeHashCode();
-	}
+        // Ensure this is always called last.
+        this.hashCode = this.makeHashCode();
+    }
 
-	Bounds getBounds( final FuzzyMode fuzzy, final boolean ignoreMeta )
-	{
-		return new Bounds( this.itemStack, fuzzy, ignoreMeta );
-	}
+    ItemStack getDefinition() {
+        return this.itemStack;
+    }
 
-	ItemStack getDefinition()
-	{
-		return this.itemStack;
-	}
+    int getItemDamage() {
+        return this.itemDamage;
+    }
 
-	int getItemDamage()
-	{
-		return this.itemDamage;
-	}
+    @Override
+    public int hashCode() {
+        return this.hashCode;
+    }
 
-	int getItemID()
-	{
-		return this.itemId;
-	}
+    @Override
+    public boolean equals(final Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!(obj instanceof AESharedItemStack)) {
+            return false;
+        }
 
-	@Override
-	public int hashCode()
-	{
-		return this.hashCode;
-	}
+        final AESharedItemStack other = (AESharedItemStack) obj;
+        Preconditions.checkState(this.itemStack.getCount() == 1, "ItemStack#getCount() has to be 1");
+        Preconditions.checkArgument(other.getDefinition().getCount() == 1, "ItemStack#getCount() has to be 1");
 
-	@Override
-	public boolean equals( final Object obj )
-	{
-		if( obj instanceof AESharedItemStack )
-		{
-			final AESharedItemStack other = (AESharedItemStack) obj;
+        if (this.itemStack == other.itemStack) {
+            return true;
+        }
+        return ItemStack.areItemStacksEqual(this.itemStack, other.itemStack);
+    }
 
-			Preconditions.checkState( this.itemStack.getCount() == 1, "ItemStack#getCount() has to be 1" );
-			Preconditions.checkArgument( other.getDefinition().getCount() == 1, "ItemStack#getCount() has to be 1" );
+    private int makeHashCode() {
+        return Objects.hash(
+                this.itemId,
+                this.itemDamage,
+                this.itemStack.hasTagCompound() ? this.itemStack.getTagCompound() : 0);
+    }
 
-			if( this.itemStack == other.itemStack )
-			{
-				return true;
-			}
-			return ItemStack.areItemStacksEqual( this.itemStack, other.itemStack );
-		}
-		return false;
-	}
-
-	@Override
-	public int compareTo( final AESharedItemStack b )
-	{
-		Preconditions.checkState( this.itemStack.getCount() == 1, "ItemStack#getCount() has to be 1" );
-		Preconditions.checkArgument( b.getDefinition().getCount() == 1, "ItemStack#getCount() has to be 1" );
-
-		if( this.itemStack == b.getDefinition() )
-		{
-			return 0;
-		}
-
-		final int id = this.itemId - b.itemId;
-		if( id != 0 )
-		{
-			return id;
-		}
-
-		final int damageValue = this.itemDamage - b.itemDamage;
-		if( damageValue != 0 )
-		{
-			return damageValue;
-		}
-
-		final int nbt = this.compareNBT( b.getDefinition() );
-		if( nbt != 0 )
-		{
-			return nbt;
-		}
-
-		if( !this.itemStack.areCapsCompatible( b.getDefinition() ) )
-		{
-			return System.identityHashCode( this.itemStack ) - System.identityHashCode( b.getDefinition() );
-		}
-		return 0;
-	}
-
-	private int compareNBT( final ItemStack b )
-	{
-		if( this.itemStack.getTagCompound() == b.getTagCompound() )
-		{
-			return 0;
-		}
-		if( this.itemStack.getTagCompound() == LOW_TAG || b.getTagCompound() == HIGH_TAG )
-		{
-			return -1;
-		}
-		if( this.itemStack.getTagCompound() == HIGH_TAG || b.getTagCompound() == LOW_TAG )
-		{
-			return 1;
-		}
-		return System.identityHashCode( this.itemStack.getTagCompound() ) - System.identityHashCode( b.getTagCompound() );
-	}
-
-	private int makeHashCode()
-	{
-		return Objects.hash( this.itemId, this.itemDamage, this.itemStack.hasTagCompound() ? this.itemStack.getTagCompound() : 0 );
-	}
-
-	/**
-	 * Creates the lower and upper bounds for a specific shared itemstack.
-	 */
-	public static final class Bounds
-	{
-		/**
-		 * Bounds enforced by {@link ItemStack#isEmpty()}
-		 */
-		private static final int MIN_DAMAGE_VALUE = 0;
-		private static final int MAX_DAMAGE_VALUE = 65535;
-
-		private final AESharedItemStack lower;
-		private final AESharedItemStack upper;
-
-		public Bounds( final ItemStack stack, final FuzzyMode fuzzy, final boolean ignoreMeta )
-		{
-			Preconditions.checkState( !stack.isEmpty(), "ItemStack#isEmpty() has to be false" );
-			Preconditions.checkState( stack.getCount() == 1, "ItemStack#getCount() has to be 1" );
-
-			final NBTTagCompound tag = stack.hasTagCompound() ? stack.getTagCompound() : null;
-
-			this.lower = this.makeLowerBound( stack, tag, fuzzy, ignoreMeta );
-			this.upper = this.makeUpperBound( stack, tag, fuzzy, ignoreMeta );
-		}
-
-		public AESharedItemStack lower()
-		{
-			return this.lower;
-		}
-
-		public AESharedItemStack upper()
-		{
-			return this.upper;
-		}
-
-		private AESharedItemStack makeLowerBound( final ItemStack itemStack, final NBTTagCompound tag, final FuzzyMode fuzzy, final boolean ignoreMeta )
-		{
-			final ItemStack newDef = itemStack.copy();
-
-			if( ignoreMeta )
-			{
-				newDef.setItemDamage( MIN_DAMAGE_VALUE );
-				newDef.setTagCompound( tag );
-			}
-			else
-			{
-				if( newDef.getItem().isDamageable() )
-				{
-					if (itemStack.getMaxDamage() == 0)
-					{
-						newDef.setItemDamage(itemStack.getItemDamage() );
-					}
-					else if ( fuzzy == FuzzyMode.IGNORE_ALL )
-					{
-						newDef.setItemDamage( MIN_DAMAGE_VALUE );
-					}
-					else if( fuzzy == FuzzyMode.PERCENT_99 )
-					{
-						if( itemStack.getItemDamage() == MIN_DAMAGE_VALUE )
-						{
-							newDef.setItemDamage( MIN_DAMAGE_VALUE );
-						}
-						else
-						{
-							newDef.setItemDamage( MIN_DAMAGE_VALUE + 1 );
-						}
-					}
-					else
-					{
-						final int breakpoint = fuzzy.calculateBreakPoint( itemStack.getMaxDamage() );
-						final int damage = breakpoint <= itemStack.getItemDamage() ? breakpoint : 0;
-						newDef.setItemDamage( damage );
-					}
-				}
-				newDef.setTagCompound( LOW_TAG );
-			}
-
-			return new AESharedItemStack( newDef );
-		}
-
-		private AESharedItemStack makeUpperBound( final ItemStack itemStack, final NBTTagCompound tag, final FuzzyMode fuzzy, final boolean ignoreMeta )
-		{
-			final ItemStack newDef = itemStack.copy();
-
-			if( ignoreMeta )
-			{
-				newDef.setItemDamage( MAX_DAMAGE_VALUE );
-				newDef.setTagCompound( tag );
-			}
-			else
-			{
-				if( newDef.getItem().isDamageable() )
-				{
-					if (itemStack.getMaxDamage() == 0)
-					{
-						newDef.setItemDamage(itemStack.getItemDamage() );
-					}
-					else if ( fuzzy == FuzzyMode.IGNORE_ALL )
-					{
-						newDef.setItemDamage( itemStack.getMaxDamage() + 1 );
-					}
-					else if( fuzzy == FuzzyMode.PERCENT_99 )
-					{
-						if( itemStack.getItemDamage() == MIN_DAMAGE_VALUE )
-						{
-							newDef.setItemDamage( MIN_DAMAGE_VALUE );
-						}
-						else
-						{
-							newDef.setItemDamage( itemStack.getMaxDamage() + 1 );
-						}
-					}
-					else
-					{
-						final int breakpoint = fuzzy.calculateBreakPoint( itemStack.getMaxDamage() );
-						final int damage = itemStack.getItemDamage() < breakpoint ? breakpoint - 1 : itemStack.getMaxDamage() + 1;
-						newDef.setItemDamage( damage );
-					}
-				}
-				newDef.setTagCompound( HIGH_TAG );
-			}
-
-			return new AESharedItemStack( newDef );
-		}
-
-	}
 }

src/main/java/appeng/util/item/AEStack.java

@@ -18,169 +18,152 @@
 
 package appeng.util.item;
 
-
+import appeng.api.storage.data.IAEStack;
 import io.netty.buffer.ByteBuf;
 
-import appeng.api.storage.data.IAEStack;
 
+public abstract class AEStack<T extends IAEStack<T>> implements IAEStack<T> {
 
-public abstract class AEStack<StackType extends IAEStack<StackType>> implements IAEStack<StackType>
-{
+    private boolean isCraftable;
+    private long stackSize;
+    private long countRequestable;
 
-	private boolean isCraftable;
-	private long stackSize;
-	private long countRequestable;
+    protected static long getPacketValue( final byte type, final ByteBuf tag )
+    {
+        if( type == 0 )
+        {
+            long l = tag.readByte();
+            l -= Byte.MIN_VALUE;
+            return l;
+        }
+        else if( type == 1 )
+        {
+            long l = tag.readShort();
+            l -= Short.MIN_VALUE;
+            return l;
+        }
+        else if( type == 2 )
+        {
+            long l = tag.readInt();
+            l -= Integer.MIN_VALUE;
+            return l;
+        }
 
-	protected static long getPacketValue( final byte type, final ByteBuf tag )
-	{
-		if( type == 0 )
-		{
-			long l = tag.readByte();
-			l -= Byte.MIN_VALUE;
-			return l;
-		}
-		else if( type == 1 )
-		{
-			long l = tag.readShort();
-			l -= Short.MIN_VALUE;
-			return l;
-		}
-		else if( type == 2 )
-		{
-			long l = tag.readInt();
-			l -= Integer.MIN_VALUE;
-			return l;
-		}
+        return tag.readLong();
+    }
 
-		return tag.readLong();
-	}
+    @Override
+    public long getStackSize() {
+        return this.stackSize;
+    }
 
-	@Override
-	public long getStackSize()
-	{
-		return this.stackSize;
-	}
+    @Override
+    public T setStackSize(final long ss) {
+        this.stackSize = ss;
+        return (T) this;
+    }
 
-	@Override
-	public StackType setStackSize( final long ss )
-	{
-		this.stackSize = ss;
-		return (StackType) this;
-	}
+    @Override
+    public long getCountRequestable() {
+        return this.countRequestable;
+    }
 
-	@Override
-	public long getCountRequestable()
-	{
-		return this.countRequestable;
-	}
+    @Override
+    public T setCountRequestable(final long countRequestable) {
+        this.countRequestable = countRequestable;
+        return (T) this;
+    }
 
-	@Override
-	public StackType setCountRequestable( final long countRequestable )
-	{
-		this.countRequestable = countRequestable;
-		return (StackType) this;
-	}
+    @Override
+    public boolean isCraftable() {
+        return this.isCraftable;
+    }
 
-	@Override
-	public boolean isCraftable()
-	{
-		return this.isCraftable;
-	}
+    @Override
+    public T setCraftable(final boolean isCraftable) {
+        this.isCraftable = isCraftable;
+        return (T) this;
+    }
 
-	@Override
-	public StackType setCraftable( final boolean isCraftable )
-	{
-		this.isCraftable = isCraftable;
-		return (StackType) this;
-	}
+    @Override
+    public T reset() {
+        this.stackSize = 0;
+        this.setCountRequestable(0);
+        this.setCraftable(false);
+        return (T) this;
+    }
 
-	@Override
-	public StackType reset()
-	{
-		this.stackSize = 0;
-		// priority = Integer.MIN_VALUE;
-		this.setCountRequestable( 0 );
-		this.setCraftable( false );
-		return (StackType) this;
-	}
+    @Override
+    public T empty() {
+        final T dup = this.copy();
+        dup.reset();
+        return dup;
+    }
 
-	@Override
-	public StackType empty()
-	{
-		final StackType dup = this.copy();
-		dup.reset();
-		return dup;
-	}
+    @Override
+    public boolean isMeaningful() {
+        return this.stackSize != 0 || this.countRequestable > 0 || this.isCraftable;
+    }
 
-	@Override
-	public boolean isMeaningful()
-	{
-		return this.stackSize != 0 || this.countRequestable > 0 || this.isCraftable;
-	}
+    @Override
+    public void incStackSize(final long i) {
+        this.stackSize += i;
+    }
 
-	@Override
-	public void incStackSize( final long i )
-	{
-		this.stackSize += i;
-	}
+    @Override
+    public void decStackSize(final long i) {
+        this.stackSize -= i;
+    }
 
-	@Override
-	public void decStackSize( final long i )
-	{
-		this.stackSize -= i;
-	}
+    @Override
+    public void incCountRequestable(final long i) {
+        this.countRequestable += i;
+    }
 
-	@Override
-	public void incCountRequestable( final long i )
-	{
-		this.countRequestable += i;
-	}
+    @Override
+    public void decCountRequestable(final long i) {
+        this.countRequestable -= i;
+    }
 
-	@Override
-	public void decCountRequestable( final long i )
-	{
-		this.countRequestable -= i;
-	}
+    protected byte getType( final long num )
+    {
+        if( num <= 255 )
+        {
+            return 0;
+        }
+        else if( num <= 65535 )
+        {
+            return 1;
+        }
+        else if( num <= 4294967295L )
+        {
+            return 2;
+        }
+        else
+        {
+            return 3;
+        }
+    }
 
-	protected byte getType( final long num )
-	{
-		if( num <= 255 )
-		{
-			return 0;
-		}
-		else if( num <= 65535 )
-		{
-			return 1;
-		}
-		else if( num <= 4294967295L )
-		{
-			return 2;
-		}
-		else
-		{
-			return 3;
-		}
-	}
+    protected abstract boolean hasTagCompound();
 
-	protected abstract boolean hasTagCompound();
-
-	protected void putPacketValue( final ByteBuf tag, final long num )
-	{
-		if( num <= 255 )
-		{
-			tag.writeByte( (byte) ( num + Byte.MIN_VALUE ) );
-		}
-		else if( num <= 65535 )
-		{
-			tag.writeShort( (short) ( num + Short.MIN_VALUE ) );
-		}
-		else if( num <= 4294967295L )
-		{
-			tag.writeInt( (int) ( num + Integer.MIN_VALUE ) );
-		}
-		else
-		{
-			tag.writeLong( num );
-		}
-	}
+    protected void putPacketValue( final ByteBuf tag, final long num )
+    {
+        if( num <= 255 )
+        {
+            tag.writeByte( (byte) ( num + Byte.MIN_VALUE ) );
+        }
+        else if( num <= 65535 )
+        {
+            tag.writeShort( (short) ( num + Short.MIN_VALUE ) );
+        }
+        else if( num <= 4294967295L )
+        {
+            tag.writeInt( (int) ( num + Integer.MIN_VALUE ) );
+        }
+        else
+        {
+            tag.writeLong( num );
+        }
+    }
 }

src/main/java/appeng/util/item/FuzzyItemVariantList.java

@@ -0,0 +1,192 @@
+/*
+ * This file is part of Applied Energistics 2.
+ * Copyright (c) 2021, TeamAppliedEnergistics, All rights reserved.
+ *
+ * Applied Energistics 2 is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Applied Energistics 2 is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Applied Energistics 2.  If not, see <http://www.gnu.org/licenses/lgpl>.
+ */
+
+package appeng.util.item;
+
+import java.util.Collection;
+import java.util.Comparator;
+import java.util.Map;
+
+import appeng.util.Platform;
+import com.google.common.base.Preconditions;
+
+import gregtech.common.items.MetaTool;
+import net.minecraft.item.ItemStack;
+
+import it.unimi.dsi.fastutil.objects.Object2ObjectAVLTreeMap;
+import it.unimi.dsi.fastutil.objects.Object2ObjectSortedMap;
+
+import appeng.api.config.FuzzyMode;
+import appeng.api.storage.data.IAEItemStack;
+
+/**
+ * This variant list is optimized for damageable items, and supports selecting durability ranges with
+ * {@link #findFuzzy(IAEItemStack, FuzzyMode)}.
+ */
+class FuzzyItemVariantList extends ItemVariantList {
+
+    static final SharedStackComparator COMPARATOR = new SharedStackComparator();
+
+    // NOTE: We only use Object as they key here so we can pass our special DamageBounds to the subMap method.
+    // We NEVER put any keys in this map that are not AESharedItemStacks.
+    private final Object2ObjectSortedMap<Object, IAEItemStack> records = new Object2ObjectAVLTreeMap<>(COMPARATOR);
+
+    @Override
+    public Collection<IAEItemStack> findFuzzy(final IAEItemStack filter, final FuzzyMode fuzzy) {
+        ItemStack itemStack = filter.getDefinition();
+
+        ItemDamageBound lowerBound = makeLowerBound(itemStack, fuzzy);
+        ItemDamageBound upperBound = makeUpperBound(itemStack, fuzzy);
+        Preconditions.checkState(lowerBound.itemDamage > upperBound.itemDamage);
+
+        return this.records.subMap(lowerBound, upperBound).values();
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    Map<AESharedItemStack, IAEItemStack> getRecords() {
+        // We ensure on our end that we NEVER use anything but AESharedItemStack as the key in this map
+        return (Map<AESharedItemStack, IAEItemStack>) (Object) this.records;
+    }
+
+    static class ItemDamageBound {
+        final int itemDamage;
+
+        public ItemDamageBound(int itemDamage) {
+            this.itemDamage = itemDamage;
+        }
+    }
+
+    /**
+     * This comparator creates a strict and total ordering over all {@link AESharedItemStack} of the same item. To
+     * support selecting ranges of durability, it is defined for type {@link Object} and also accepts
+     * {@link ItemDamageBound} as an argument to compare against.
+     */
+    static class SharedStackComparator implements Comparator<Object> {
+        @Override
+        public int compare(Object a, Object b) {
+            // Either argument can either be a damage bound or a shared item stack
+            // Since we never put damage bounds into the map as keys, only one
+            // of the two arguments can possibly be a bound
+            ItemDamageBound boundA = null;
+            AESharedItemStack stackA = null;
+            int itemDamageA;
+            if (a instanceof ItemDamageBound) {
+                boundA = (ItemDamageBound) a;
+                itemDamageA = boundA.itemDamage;
+            } else {
+                stackA = (AESharedItemStack) a;
+                itemDamageA = stackA.getItemDamage();
+            }
+            ItemDamageBound boundB = null;
+            AESharedItemStack stackB = null;
+            int itemDamageB;
+            if (b instanceof ItemDamageBound) {
+                boundB = (ItemDamageBound) b;
+                itemDamageB = boundB.itemDamage;
+            } else {
+                stackB = (AESharedItemStack) b;
+                itemDamageB = stackB.getItemDamage();
+            }
+
+            // When either argument is a damage bound, we just compare the damage values because it is used
+            // only to get a certain damage range out of the map.
+            if (boundA != null || boundB != null) {
+                return Integer.compare(itemDamageB, itemDamageA);
+            }
+
+            ItemStack itemStackA = stackA.getDefinition();
+            ItemStack itemStackB = stackB.getDefinition();
+            Preconditions.checkState(itemStackA.getCount() == 1, "ItemStack#getCount() has to be 1");
+            Preconditions.checkArgument(itemStackB.getCount() == 1, "ItemStack#getCount() has to be 1");
+
+            if (itemStackA == itemStackB) {
+                return 0;
+            }
+
+            // Damaged items are sorted before undamaged items
+            final int damageValue = Integer.compare(itemDamageB, itemDamageA);
+            if (damageValue != 0) {
+                return damageValue;
+            }
+
+            // As a final tie breaker, order by the object identity of the item stack
+            // While this will order seemingly at random, we only need the order of
+            // damage values to be predictable, while still having to satisfy the
+            // complete order requirements of the sorted map
+            return Long.compare(System.identityHashCode(itemStackA), System.identityHashCode(itemStackB));
+        }
+    }
+
+    /**
+     * Minecraft reverses the damage values. So anything with a damage of 0 is undamaged and increases the more damaged
+     * the item is.
+     * <p>
+     * Further the used subMap follows [MAX_DAMAGE, MIN_DAMAGE), so to include undamaged items, we have to start with a
+     * lower damage value than 0, while it is fine to use {@link ItemStack#getMaxDamage()} for the upper bound.
+     */
+    private static final int MIN_DAMAGE_VALUE = -1;
+
+    /*
+     * Keep in mind that the stack order is from most damaged to least damaged, so this lower bound will actually be a
+     * higher number than the upper bound.
+     */
+    static ItemDamageBound makeLowerBound(final ItemStack stack, final FuzzyMode fuzzy)
+    {
+        Preconditions.checkState( stack.getItem().isDamageable() , "Item#isDamageable() has to be true" );
+
+        int damage;
+        if( fuzzy == FuzzyMode.IGNORE_ALL )
+        {
+            if( stack.getMaxDamage() == 0 )
+            {
+                damage = stack.getItemDamage();
+            }
+            else
+            {
+                damage = stack.getMaxDamage();
+            }
+        }
+        else
+        {
+            final int breakpoint = fuzzy.calculateBreakPoint( stack.getMaxDamage() );
+            damage = stack.getItemDamage() <= breakpoint ? breakpoint : stack.getMaxDamage();
+        }
+
+        return new ItemDamageBound( damage );
+    }
+
+    /*
+     * Keep in mind that the stack order is from most damaged to least damaged, so this upper bound will actually be a
+     * lower number than the lower bound. It also is exclusive.
+     */
+    static ItemDamageBound makeUpperBound(final ItemStack stack, final FuzzyMode fuzzy) {
+        Preconditions.checkState(stack.getItem().isDamageable() , "Item#isDamageable() has to be true");
+
+        int damage;
+        if (fuzzy == FuzzyMode.IGNORE_ALL) {
+            damage = MIN_DAMAGE_VALUE;
+        } else {
+            final int breakpoint = fuzzy.calculateBreakPoint(stack.getMaxDamage());
+            damage = stack.getItemDamage() <= breakpoint ? MIN_DAMAGE_VALUE : breakpoint;
+        }
+
+        return new ItemDamageBound(damage);
+    }
+
+}

src/main/java/appeng/util/item/ItemList.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of Applied Energistics 2.
- * Copyright (c) 2013 - 2015, AlgorithmX2, All rights reserved.
+ * Copyright (c) 2013 - 2020, AlgorithmX2, All rights reserved.
  *
  * Applied Energistics 2 is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by
@@ -18,212 +18,198 @@
 
 package appeng.util.item;
 
-
-import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.ConcurrentModificationException;
 import java.util.Iterator;
-import java.util.NavigableMap;
-import java.util.concurrent.ConcurrentSkipListMap;
+import java.util.NoSuchElementException;
+import java.util.concurrent.atomic.AtomicInteger;
 
-import net.minecraftforge.oredict.OreDictionary;
+import appeng.util.Platform;
+import gregtech.common.items.MetaTool;
+import net.minecraft.item.Item;
+
+import it.unimi.dsi.fastutil.objects.Reference2ObjectMap;
+import it.unimi.dsi.fastutil.objects.Reference2ObjectOpenHashMap;
 
 import appeng.api.config.FuzzyMode;
 import appeng.api.storage.data.IAEItemStack;
 import appeng.api.storage.data.IItemList;
-import appeng.util.item.AESharedItemStack.Bounds;
 
+public final class ItemList implements IItemList<IAEItemStack> {
 
-public final class ItemList implements IItemList<IAEItemStack>
-{
+    private final Reference2ObjectMap<Item, ItemVariantList> records = new Reference2ObjectOpenHashMap<>();
+    /**
+     * We increment this version field everytime an attempt to mutate this item list (or potentially one of its
+     * sub-lists) is made. Iterators will copy the version when they are created and compare it against the current
+     * version whenever they advance to trigger a {@link ConcurrentModificationException}.
+     */
+    private final AtomicInteger version = new AtomicInteger(0);
 
-	private final NavigableMap<AESharedItemStack, IAEItemStack> records = new ConcurrentSkipListMap<>();
+    @Override
+    public IAEItemStack findPrecise(final IAEItemStack itemStack) {
+        if (itemStack == null) {
+            return null;
+        }
 
-	@Override
-	public void add( final IAEItemStack option )
-	{
-		if( option == null )
-		{
-			return;
-		}
+        ItemVariantList record = this.records.get(itemStack.getItem());
+        return record != null ? record.findPrecise(itemStack) : null;
+    }
 
-		final IAEItemStack st = this.records.get( ( (AEItemStack) option ).getSharedStack() );
+    @Override
+    public Collection<IAEItemStack> findFuzzy(final IAEItemStack filter, final FuzzyMode fuzzy) {
+        if (filter == null) {
+            return Collections.emptyList();
+        }
 
-		if( st != null )
-		{
-			st.add( option );
-			return;
-		}
+        ItemVariantList record = this.records.get(filter.getItem());
+        return record != null ? record.findFuzzy(filter, fuzzy) : Collections.emptyList();
+    }
 
-		final IAEItemStack opt = option.copy();
+    @Override
+    public boolean isEmpty() {
+        return !this.iterator().hasNext();
+    }
 
-		this.putItemRecord( opt );
-	}
+    @Override
+    public void add(final IAEItemStack itemStack) {
+        version.incrementAndGet();
 
-	@Override
-	public IAEItemStack findPrecise( final IAEItemStack itemStack )
-	{
-		if( itemStack == null )
-		{
-			return null;
-		}
+        if (itemStack == null) {
+            return;
+        }
 
-		return this.records.get( ( (AEItemStack) itemStack ).getSharedStack() );
-	}
+        this.getOrCreateRecord(itemStack.getItem()).add(itemStack);
+    }
 
-	@Override
-	public Collection<IAEItemStack> findFuzzy( final IAEItemStack filter, final FuzzyMode fuzzy )
-	{
-		if( filter == null )
-		{
-			return Collections.emptyList();
-		}
+    @Override
+    public void addStorage(final IAEItemStack itemStack) {
+        version.incrementAndGet();
 
-		final AEItemStack ais = (AEItemStack) filter;
+        if (itemStack == null) {
+            return;
+        }
 
-		return ais.getOre().map( or ->
-		{
-			if( or.getAEEquivalents().size() == 1 )
-			{
-				final IAEItemStack is = or.getAEEquivalents().get( 0 );
+        this.getOrCreateRecord(itemStack.getItem()).addStorage(itemStack);
+    }
 
-				return this.findFuzzyDamage( is, fuzzy, is.getItemDamage() == OreDictionary.WILDCARD_VALUE );
-			}
-			else
-			{
-				final Collection<IAEItemStack> output = new ArrayList<>();
+    @Override
+    public void addCrafting(final IAEItemStack itemStack) {
+        version.incrementAndGet();
 
-				for( final IAEItemStack is : or.getAEEquivalents() )
-				{
-					output.addAll( this.findFuzzyDamage( is, fuzzy, is.getItemDamage() == OreDictionary.WILDCARD_VALUE ) );
-				}
+        if (itemStack == null) {
+            return;
+        }
 
-				return output;
-			}
-		} ).orElse( this.findFuzzyDamage( ais, fuzzy, false ) );
-	}
+        this.getOrCreateRecord(itemStack.getItem()).addCrafting(itemStack);
+    }
 
-	@Override
-	public boolean isEmpty()
-	{
-		return !this.iterator().hasNext();
-	}
+    @Override
+    public void addRequestable(final IAEItemStack itemStack) {
+        version.incrementAndGet();
 
-	@Override
-	public void addStorage( final IAEItemStack option )
-	{
-		if( option == null )
-		{
-			return;
-		}
+        if (itemStack == null) {
+            return;
+        }
 
-		final IAEItemStack st = this.records.get( ( (AEItemStack) option ).getSharedStack() );
+        this.getOrCreateRecord(itemStack.getItem()).addRequestable(itemStack);
+    }
 
-		if( st != null )
-		{
-			st.incStackSize( option.getStackSize() );
-			return;
-		}
+    @Override
+    public IAEItemStack getFirstItem() {
+        for (final IAEItemStack stackType : this) {
+            return stackType;
+        }
 
-		final IAEItemStack opt = option.copy();
+        return null;
+    }
 
-		this.putItemRecord( opt );
-	}
+    @Override
+    public int size() {
+        int size = 0;
+        for (ItemVariantList entry : records.values()) {
+            size += entry.size();
+        }
 
-	/*
-	 * public void clean() { Iterator<StackType> i = iterator(); while (i.hasNext()) { StackType AEI =
-	 * i.next(); if ( !AEI.isMeaningful() ) i.remove(); } }
-	 */
+        return size;
+    }
 
-	@Override
-	public void addCrafting( final IAEItemStack option )
-	{
-		if( option == null )
-		{
-			return;
-		}
+    @Override
+    public Iterator<IAEItemStack> iterator() {
+        return new ChainedIterator(this.records.values().iterator(), version);
+    }
 
-		final IAEItemStack st = this.records.get( ( (AEItemStack) option ).getSharedStack() );
+    @Override
+    public void resetStatus() {
+        for (final IAEItemStack i : this) {
+            i.reset();
+        }
+    }
 
-		if( st != null )
-		{
-			st.setCraftable( true );
-			return;
-		}
+    private ItemVariantList getOrCreateRecord(Item item) {
+        return this.records.computeIfAbsent(item, this::makeRecordMap);
+    }
 
-		final IAEItemStack opt = option.copy();
-		opt.setStackSize( 0 );
-		opt.setCraftable( true );
+    private ItemVariantList makeRecordMap(Item item) {
+        if (item.isDamageable() ) {
+            return new FuzzyItemVariantList();
+        } else {
+            return new NormalItemVariantList();
+        }
+    }
 
-		this.putItemRecord( opt );
-	}
+    /**
+     * Iterates over multiple item lists as if they were one list.
+     */
+    private static class ChainedIterator implements Iterator<IAEItemStack> {
 
-	@Override
-	public void addRequestable( final IAEItemStack option )
-	{
-		if( option == null )
-		{
-			return;
-		}
+        private final AtomicInteger parentVersion;
+        private final int version;
+        private final Iterator<ItemVariantList> parent;
+        private Iterator<IAEItemStack> next;
 
-		final IAEItemStack st = this.records.get( ( (AEItemStack) option ).getSharedStack() );
+        public ChainedIterator(Iterator<ItemVariantList> iterator, AtomicInteger parentVersion) {
+            this.parent = iterator;
+            this.parentVersion = parentVersion;
+            this.version = parentVersion.get();
+            this.ensureItems();
+        }
 
-		if( st != null )
-		{
-			st.setCountRequestable( st.getCountRequestable() + option.getCountRequestable() );
-			return;
-		}
+        @Override
+        public boolean hasNext() {
+            return next != null && next.hasNext();
+        }
 
-		final IAEItemStack opt = option.copy();
-		opt.setStackSize( 0 );
-		opt.setCraftable( false );
-		opt.setCountRequestable( option.getCountRequestable() );
+        @Override
+        public IAEItemStack next() {
+            if (this.next == null) {
+                throw new NoSuchElementException();
+            }
+            if (this.version != this.parentVersion.get()) {
+                throw new ConcurrentModificationException();
+            }
 
-		this.putItemRecord( opt );
-	}
+            IAEItemStack result = this.next.next();
+            this.ensureItems();
+            return result;
+        }
 
-	@Override
-	public IAEItemStack getFirstItem()
-	{
-		for( final IAEItemStack stackType : this )
-		{
-			return stackType;
-		}
+        private void ensureItems() {
+            if (hasNext()) {
+                return; // Still items left in the current one
+            }
 
-		return null;
-	}
+            // Find the next iterator willing to return some items...
+            while (this.parent.hasNext()) {
+                this.next = this.parent.next().iterator();
 
-	@Override
-	public int size()
-	{
-		return this.records.size();
-	}
+                if (this.next.hasNext()) {
+                    return; // Found one!
+                }
+            }
 
-	@Override
-	public Iterator<IAEItemStack> iterator()
-	{
-		return new MeaningfulItemIterator<>( this.records.values().iterator() );
-	}
-
-	@Override
-	public void resetStatus()
-	{
-		for( final IAEItemStack i : this )
-		{
-			i.reset();
-		}
-	}
-
-	private IAEItemStack putItemRecord( final IAEItemStack itemStack )
-	{
-		return this.records.put( ( (AEItemStack) itemStack ).getSharedStack(), itemStack );
-	}
-
-	private Collection<IAEItemStack> findFuzzyDamage( final IAEItemStack filter, final FuzzyMode fuzzy, final boolean ignoreMeta )
-	{
-		final AEItemStack itemStack = (AEItemStack) filter;
-		final Bounds bounds = itemStack.getSharedStack().getBounds( fuzzy, ignoreMeta );
-
-		return this.records.subMap( bounds.lower(), true, bounds.upper(), true ).descendingMap().values();
-	}
+            // No more items
+            this.next = null;
+        }
+    }
 }

src/main/java/appeng/util/item/ItemVariantList.java

@@ -0,0 +1,118 @@
+/*
+ * This file is part of Applied Energistics 2.
+ * Copyright (c) 2021, TeamAppliedEnergistics, All rights reserved.
+ *
+ * Applied Energistics 2 is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Applied Energistics 2 is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Applied Energistics 2.  If not, see <http://www.gnu.org/licenses/lgpl>.
+ */
+
+package appeng.util.item;
+
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.Map;
+
+import appeng.api.config.FuzzyMode;
+import appeng.api.storage.data.IAEItemStack;
+
+/**
+ * Stores variants of a single type of {@link net.minecraft.item.Item}, i.e. versions with different durability, or
+ * different NBT or capabilities.
+ */
+abstract class ItemVariantList {
+
+    public void add(final IAEItemStack option) {
+        final IAEItemStack st = this.getRecords().get(((AEItemStack) option).getSharedStack());
+
+        if (st != null) {
+            st.add(option);
+            return;
+        }
+
+        final IAEItemStack opt = option.copy();
+
+        this.putItemRecord(opt);
+    }
+
+    public IAEItemStack findPrecise(final IAEItemStack itemStack) {
+        return this.getRecords().get(((AEItemStack) itemStack).getSharedStack());
+    }
+
+    public void addStorage(final IAEItemStack option) {
+        final IAEItemStack st = this.getRecords().get(((AEItemStack) option).getSharedStack());
+
+        if (st != null) {
+            st.incStackSize(option.getStackSize());
+            return;
+        }
+
+        final IAEItemStack opt = option.copy();
+
+        this.putItemRecord(opt);
+    }
+
+    public void addCrafting(final IAEItemStack option) {
+        final IAEItemStack st = this.getRecords().get(((AEItemStack) option).getSharedStack());
+
+        if (st != null) {
+            st.setCraftable(true);
+            return;
+        }
+
+        final IAEItemStack opt = option.copy();
+        opt.setStackSize(0);
+        opt.setCraftable(true);
+
+        this.putItemRecord(opt);
+    }
+
+    public void addRequestable(final IAEItemStack option) {
+        final IAEItemStack st = this.getRecords().get(((AEItemStack) option).getSharedStack());
+
+        if (st != null) {
+            st.setCountRequestable(st.getCountRequestable() + option.getCountRequestable());
+            return;
+        }
+
+        final IAEItemStack opt = option.copy();
+        opt.setStackSize(0);
+        opt.setCraftable(false);
+        opt.setCountRequestable(option.getCountRequestable());
+
+        this.putItemRecord(opt);
+    }
+
+    public int size() {
+        int size = 0;
+        for (IAEItemStack entry : getRecords().values()) {
+            if (entry.isMeaningful()) {
+                size++;
+            }
+        }
+
+        return size;
+    }
+
+    public Iterator<IAEItemStack> iterator() {
+        return new MeaningfulItemIterator<>(this.getRecords().values());
+    }
+
+    private void putItemRecord(final IAEItemStack itemStack) {
+        this.getRecords().put(((AEItemStack) itemStack).getSharedStack(), itemStack);
+    }
+
+    abstract Map<AESharedItemStack, IAEItemStack> getRecords();
+
+    public abstract Collection<IAEItemStack> findFuzzy(final IAEItemStack filter, final FuzzyMode fuzzy);
+
+}

src/main/java/appeng/util/item/MeaningfulItemIterator.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of Applied Energistics 2.
- * Copyright (c) 2013 - 2015, AlgorithmX2, All rights reserved.
+ * Copyright (c) 2021, TeamAppliedEnergistics, All rights reserved.
  *
  * Applied Energistics 2 is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by
@@ -18,59 +18,53 @@
 
 package appeng.util.item;
 
-
+import java.util.Collection;
 import java.util.Iterator;
 import java.util.NoSuchElementException;
 
 import appeng.api.storage.data.IAEItemStack;
 
+/**
+ * This iterator will only return items from a collection that are meaningful (w.r.t.
+ * {@link IAEItemStack#isMeaningful()}. Items that are not meaningful are automatically removed from the collection as
+ * it is being iterated.
+ */
+public class MeaningfulItemIterator<T extends IAEItemStack> implements Iterator<T> {
+    private final Iterator<T> parent;
+    private T next;
 
-public class MeaningfulItemIterator<T extends IAEItemStack> implements Iterator<T>
-{
+    public MeaningfulItemIterator(final Collection<T> collection) {
+        this.parent = collection.iterator();
+        this.next = seekNext();
+    }
 
-	private final Iterator<T> parent;
-	private T next;
+    @Override
+    public boolean hasNext() {
+        return this.next != null;
+    }
 
-	public MeaningfulItemIterator( final Iterator<T> iterator )
-	{
-		this.parent = iterator;
-	}
+    @Override
+    public T next() {
+        if (this.next == null) {
+            throw new NoSuchElementException();
+        }
 
-	@Override
-	public boolean hasNext()
-	{
-		while( this.parent.hasNext() )
-		{
-			this.next = this.parent.next();
+        T result = this.next;
+        this.next = this.seekNext();
+        return result;
+    }
 
-			if( this.next.isMeaningful() )
-			{
-				return true;
-			}
-			else
-			{
-				this.parent.remove(); // self cleaning :3
-			}
-		}
+    private T seekNext() {
+        while (this.parent.hasNext()) {
+            T item = this.parent.next();
 
-		this.next = null;
-		return false;
-	}
+            if (item.isMeaningful()) {
+                return item;
+            } else {
+                this.parent.remove();
+            }
+        }
 
-	@Override
-	public T next()
-	{
-		if( this.next == null )
-		{
-			throw new NoSuchElementException();
-		}
-
-		return this.next;
-	}
-
-	@Override
-	public void remove()
-	{
-		this.parent.remove();
-	}
+        return null;
+    }
 }

src/main/java/appeng/util/item/NormalItemVariantList.java

@@ -0,0 +1,51 @@
+/*
+ * This file is part of Applied Energistics 2.
+ * Copyright (c) 2021, TeamAppliedEnergistics, All rights reserved.
+ *
+ * Applied Energistics 2 is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Applied Energistics 2 is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Applied Energistics 2.  If not, see <http://www.gnu.org/licenses/lgpl>.
+ */
+
+package appeng.util.item;
+
+import java.util.Collection;
+import java.util.Map;
+
+import it.unimi.dsi.fastutil.objects.Reference2ObjectMap;
+import it.unimi.dsi.fastutil.objects.Reference2ObjectOpenHashMap;
+
+import appeng.api.config.FuzzyMode;
+import appeng.api.storage.data.IAEItemStack;
+
+/**
+ * This variant list is optimized for items that cannot be damaged and thus do not support querying durability ranges
+ * via {@link #findFuzzy(IAEItemStack, FuzzyMode)}.
+ */
+class NormalItemVariantList extends ItemVariantList {
+
+    private final Reference2ObjectMap<AESharedItemStack, IAEItemStack> records = new Reference2ObjectOpenHashMap<>();
+
+    @Override
+    Map<AESharedItemStack, IAEItemStack> getRecords() {
+        return this.records;
+    }
+
+    /**
+     * For items that do not support durability, we just return all variants to a fuzzy search.
+     */
+    @Override
+    public Collection<IAEItemStack> findFuzzy(IAEItemStack filter, FuzzyMode fuzzy) {
+        return this.getRecords().values();
+    }
+
+}

src/main/java/appeng/util/item/OreReference.java

@@ -43,7 +43,7 @@ public class OreReference
 		return this.otherOptions;
 	}
 
-	List<IAEItemStack> getAEEquivalents()
+	public List<IAEItemStack> getAEEquivalents()
 	{
 		if( this.aeOtherOptions == null )
 		{

src/main/resources/assets/appliedenergistics2/lang/en_us.lang

@@ -450,6 +450,7 @@ item.appliedenergistics2.material.basic_card.name=Basic Card
 item.appliedenergistics2.material.blank_pattern.name=Blank Pattern
 item.appliedenergistics2.material.calculation_processor.name=Calculation Processor
 item.appliedenergistics2.material.card_capacity.name=Capacity Card
+item.appliedenergistics2.material.card_pattern_expansion.name=Pattern Expansion Card
 item.appliedenergistics2.material.card_fuzzy.name=Fuzzy Card
 item.appliedenergistics2.material.card_inverter.name=Inverter Card
 item.appliedenergistics2.material.card_redstone.name=Redstone Card

src/main/resources/assets/appliedenergistics2/models/item/material_card_pattern_expansion.json

@@ -0,0 +1,6 @@
+{
+  "parent": "item/generated",
+  "textures": {
+    "layer0": "appliedenergistics2:items/material_card_pattern_expansion"
+  }
+}

src/main/resources/assets/appliedenergistics2/recipes/materials/cardpatternexpansion.json

@@ -0,0 +1,37 @@
+{
+    "conditions": [
+        {
+            "type": "forge:and",
+            "values": [
+                {
+                    "type": "appliedenergistics2:material_exists",
+                    "material": "material.card_capacity"
+                },
+                {
+                    "type": "appliedenergistics2:material_exists",
+                    "material": "material.basic_card"
+                }
+            ]
+        }
+    ],
+    "result": {
+        "type": "appliedenergistics2:part",
+        "part": "material.card_pattern_expansion"
+    },
+    "type": "appliedenergistics2:part_shapeless",
+    "ingredients": [
+        {
+            "type": "appliedenergistics2:part",
+            "part": "material.advanced_card"
+        },
+        [
+        	{
+                "item": "appliedenergistics2:interface"
+            },
+            {
+                "type": "appliedenergistics2:part",
+                "part": "part.interface"
+            }
+        ]
+    ]
+}