diff --git a/src/main/java/appeng/helpers/DualityInterface.java b/src/main/java/appeng/helpers/DualityInterface.java
index f057413e1..97060c152 100644
--- a/src/main/java/appeng/helpers/DualityInterface.java
+++ b/src/main/java/appeng/helpers/DualityInterface.java
@@ -24,6 +24,7 @@ import java.util.stream.Collectors;
 
 import javax.annotation.Nullable;
 
+import appeng.integration.modules.gregtech.GTCEInventoryAdaptor;
 import appeng.util.*;
 import appeng.util.inv.*;
 import com.google.common.collect.ImmutableSet;
@@ -137,6 +138,7 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 	private final Accessor accessor = new Accessor();
 	private EnumSet<EnumFacing> visitedFaces = EnumSet.noneOf( EnumFacing.class );
 	private EnumMap<EnumFacing,List<ItemStack>> waitingToSendFacing = new EnumMap<>(EnumFacing.class);
+	private GTCEInventoryAdaptor GTad;
 
 	public DualityInterface( final AENetworkProxy networkProxy, final IInterfaceHost ih )
 	{
@@ -1020,20 +1022,12 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 
 	private boolean invIsBlocked( InventoryAdaptor inv )
 	{
-		final Iterator<ICraftingPatternDetails> i = this.craftingList.iterator();
-		ICraftingPatternDetails patt = i.next();
-		for ( ItemSlot itemSlot : inv)
-		{
-			if (itemSlot.getItemStack().isEmpty()){
-				continue;
-			}
-			for ( IAEItemStack iaeItemStack : patt.getCondensedInputs()){
-				if (iaeItemStack.isSameType( itemSlot.getItemStack() )){
-					return true;
-				}
-			}
-		}
-		return false;
+		return  (inv.containsItems());
+	}
+
+	private static boolean invIsBlockedGTCE( GTCEInventoryAdaptor inv )
+	{
+		return ( !inv.canRemoveAllExceptCircuits() );
 	}
 
 	@Override
@@ -1091,7 +1085,16 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 				boolean isDrawer = te.getBlockType().getRegistryName().getResourceDomain().equals( "storagedrawers" );
 				if( this.isBlocking() )
 				{
-					if( invIsBlocked( ad ) )
+					if( te.getBlockType().getRegistryName().getResourceDomain().equals( "gregtech" ) )
+					{
+						GTad = GTCEInventoryAdaptor.getAdaptor( te, s.getOpposite() );
+						if( invIsBlockedGTCE( GTad ) )
+						{
+							visitedFaces.remove( s );
+							continue;
+						}
+					}
+					else if ( invIsBlocked( ad ) )
 					{
 						visitedFaces.remove( s );
 						continue;
@@ -1143,7 +1146,16 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 				final InventoryAdaptor ad = InventoryAdaptor.getAdaptor( te, s.getOpposite() );
 				if( ad != null )
 				{
-					if( !invIsBlocked( ad ) )
+					if( te.getBlockType().getRegistryName().getResourceDomain().equals( "gregtech" ) )
+					{
+						GTad = GTCEInventoryAdaptor.getAdaptor( te, s.getOpposite() );
+						if( !invIsBlockedGTCE( GTad ) )
+						{
+							allAreBusy = false;
+							break;
+						}
+					}
+					else if( !invIsBlocked( ad ) )
 					{
 						allAreBusy = false;
 						break;
diff --git a/src/main/java/appeng/integration/modules/gregtech/GTCEInventoryAdaptor.java b/src/main/java/appeng/integration/modules/gregtech/GTCEInventoryAdaptor.java
new file mode 100644
index 000000000..bbc15bebf
--- /dev/null
+++ b/src/main/java/appeng/integration/modules/gregtech/GTCEInventoryAdaptor.java
@@ -0,0 +1,26 @@
+package appeng.integration.modules.gregtech;
+
+import appeng.util.inv.ItemSlot;
+import net.minecraft.tileentity.TileEntity;
+import net.minecraft.util.EnumFacing;
+import net.minecraftforge.items.CapabilityItemHandler;
+import net.minecraftforge.items.IItemHandler;
+
+public abstract class GTCEInventoryAdaptor implements Iterable<ItemSlot>
+{
+    public static GTCEInventoryAdaptor getAdaptor(final TileEntity te, final EnumFacing d)
+    {
+        if (te != null && te.hasCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, d))
+        {
+            // Attempt getting an IItemHandler for the given side via caps
+            IItemHandler itemHandler = te.getCapability(CapabilityItemHandler.ITEM_HANDLER_CAPABILITY, d);
+            if (itemHandler != null)
+            {
+                return new GTCEItemHandler(itemHandler);
+            }
+        }
+        return null;
+    }
+
+    public abstract boolean canRemoveAllExceptCircuits();
+}
\ No newline at end of file
diff --git a/src/main/java/appeng/integration/modules/gregtech/GTCEItemHandler.java b/src/main/java/appeng/integration/modules/gregtech/GTCEItemHandler.java
new file mode 100644
index 000000000..e553f12e3
--- /dev/null
+++ b/src/main/java/appeng/integration/modules/gregtech/GTCEItemHandler.java
@@ -0,0 +1,58 @@
+package appeng.integration.modules.gregtech;
+
+import appeng.util.inv.ItemHandlerIterator;
+import appeng.util.inv.ItemSlot;
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemStack;
+import net.minecraftforge.items.IItemHandler;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+
+public class GTCEItemHandler extends GTCEInventoryAdaptor
+{
+    ArrayList<Integer> GTCElenses = new ArrayList<>(Arrays.asList(15085,15214,15092,15111,15113,15219,15218,15243,15244,15209,15117,15206,15216,15331,15212,15213,15154,15122,15157,15190,15247));
+    ArrayList<Integer> GTCEmolds = new ArrayList<>(Arrays.asList(32301,32303,32304,32305,32306,32307,32308,32309,32313,32314,32315,32317,32350,32351,32352,32353,32354,32355,32356,32358,32359,32360,32361,32363,32364,32365,32366,32367,32368,32369,32370,32371,32372,32373));
+    Item smallGearExtruderShape = Item.getByNameOrId("contenttweaker:smallgearextrudershape");
+    Item creativePortableTankMold = Item.getByNameOrId("contenttweaker:creativeportabletankmold");
+
+    protected final IItemHandler itemHandler;
+
+    public GTCEItemHandler(IItemHandler itemHandler)
+    {
+        this.itemHandler = itemHandler;
+    }
+
+    boolean isBlockableItem(ItemStack stack)
+    {
+        if ( stack.getItem() == Item.getByNameOrId("gregtech:meta_item_1") ) {
+            int metadata = stack.getItemDamage();
+            if ( metadata == 32766 || GTCElenses.contains(metadata) || GTCEmolds.contains(metadata)) {
+                return false;
+            }
+        }
+        if ( stack.getItem() == smallGearExtruderShape ) return false;
+        if ( stack.getItem() == creativePortableTankMold) return false;
+        return true;
+    }
+
+    @Override
+    public boolean canRemoveAllExceptCircuits()
+    {
+        int slots = this.itemHandler.getSlots();
+        for ( int slot = 0; slot < slots; slot++ ) {
+            ItemStack is = this.itemHandler.getStackInSlot(slot);
+            if ( is.isEmpty() || !isBlockableItem(is) ) continue;
+
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public Iterator<ItemSlot> iterator()
+    {
+        return new ItemHandlerIterator( this.itemHandler );
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/appeng/util/inv/ItemHandlerIterator.java b/src/main/java/appeng/util/inv/ItemHandlerIterator.java
index 7b4f6acf1..8447f63ad 100644
--- a/src/main/java/appeng/util/inv/ItemHandlerIterator.java
+++ b/src/main/java/appeng/util/inv/ItemHandlerIterator.java
@@ -25,7 +25,7 @@ import java.util.NoSuchElementException;
 import net.minecraftforge.items.IItemHandler;
 
 
-class ItemHandlerIterator implements Iterator<ItemSlot>
+public class ItemHandlerIterator implements Iterator<ItemSlot>
 {
 
 	private final IItemHandler itemHandler;
@@ -34,7 +34,7 @@ class ItemHandlerIterator implements Iterator<ItemSlot>
 
 	private int slot = 0;
 
-	ItemHandlerIterator( IItemHandler itemHandler )
+	public ItemHandlerIterator( IItemHandler itemHandler )
 	{
 		this.itemHandler = itemHandler;
 	}