diff --git a/src/main/java/appeng/container/implementations/ContainerInterface.java b/src/main/java/appeng/container/implementations/ContainerInterface.java
index a19d4fa3b..b2156f86d 100644
--- a/src/main/java/appeng/container/implementations/ContainerInterface.java
+++ b/src/main/java/appeng/container/implementations/ContainerInterface.java
@@ -21,6 +21,7 @@ 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;
@@ -43,6 +44,9 @@ public class ContainerInterface extends ContainerUpgradeable implements IOptiona
 	@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() );
@@ -103,9 +107,22 @@ public class ContainerInterface extends ContainerUpgradeable implements IOptiona
 	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 )
 	{
diff --git a/src/main/java/appeng/helpers/DualityInterface.java b/src/main/java/appeng/helpers/DualityInterface.java
index 53cf889a0..5e4c01527 100644
--- a/src/main/java/appeng/helpers/DualityInterface.java
+++ b/src/main/java/appeng/helpers/DualityInterface.java
@@ -23,6 +23,7 @@ import java.util.*;
 
 import javax.annotation.Nullable;
 
+import appeng.api.definitions.IItemDefinition;
 import appeng.integration.modules.gregtech.GTCEInventoryAdaptor;
 import appeng.util.*;
 import appeng.util.inv.*;
@@ -34,6 +35,7 @@ import gregtech.api.metatileentity.MetaTileEntity;
 import gregtech.api.metatileentity.MetaTileEntityHolder;
 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;
@@ -176,7 +178,6 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 		{
 			return;
 		}
-
 		if( inv == this.config )
 		{
 			this.readConfig();
@@ -592,6 +593,28 @@ 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 >= 9 + ( 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() > 1 )
+		{
+			World world = this.getLocation().getWorld();
+			BlockPos blockPos = this.getLocation().getPos();
+			Platform.spawnDrops( world, blockPos, dropList );
+		}
+	}
+
 	@Override
 	public boolean canInsert( final ItemStack stack )
 	{
diff --git a/src/main/java/appeng/parts/automation/UpgradeInventory.java b/src/main/java/appeng/parts/automation/UpgradeInventory.java
index 9e3f589c3..e75af7c4b 100644
--- a/src/main/java/appeng/parts/automation/UpgradeInventory.java
+++ b/src/main/java/appeng/parts/automation/UpgradeInventory.java
@@ -20,15 +20,19 @@ 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;
@@ -39,6 +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
 {
@@ -177,21 +184,6 @@ public abstract class UpgradeInventory extends AppEngInternalInventory implement
 	@Override
 	public ItemStack extractItem( int slot, int amount, boolean simulate )
 	{
-		if( patternExpansionUpgrades > 0 )
-		{
-			if( parent instanceof DualityInterface )
-			{
-				IItemHandler patternInv = ( (DualityInterface) parent ).getPatterns();
-				for( int invSlot = 0; invSlot < patternInv.getSlots(); invSlot++ )
-				{
-					ItemStack is = patternInv.getStackInSlot( invSlot );
-					if( invSlot > patternExpansionUpgrades * 9 && !is.isEmpty() )
-					{
-						return ItemStack.EMPTY;
-					}
-				}
-			}
-		}
 		return super.extractItem( slot, amount, simulate );
 	}