diff --git a/src/main/java/appeng/parts/automation/PartImportBus.java b/src/main/java/appeng/parts/automation/PartImportBus.java
index a56b5851f..24c10513a 100644
--- a/src/main/java/appeng/parts/automation/PartImportBus.java
+++ b/src/main/java/appeng/parts/automation/PartImportBus.java
@@ -219,8 +219,9 @@ public class PartImportBus extends PartSharedItemBus implements IInventoryDestin
 	{
 		final int toSend = this.calculateMaximumAmountToImport( myAdaptor, whatToImport, inv, fzMode );
 
-		if( toSend == 0 ){
-			return false;
+		if( toSend == 0 )
+		{
+			return true;
 		}
 
 		final ItemStack newItems;
@@ -291,9 +292,14 @@ public class PartImportBus extends PartSharedItemBus implements IInventoryDestin
 			itemAmountNotStorable = inv.injectItems( AEItemStack.fromItemStack( simResult ), Actionable.SIMULATE, this.source );
 		}
 
+		if( simResult.isEmpty() )
+		{
+			return 0;
+		}
+
 		if( itemAmountNotStorable != null )
 		{
-			if (simResult.getCount() == itemAmountNotStorable.getStackSize())
+			if( simResult.getCount() == itemAmountNotStorable.getStackSize() )
 			{
 				return 0;
 			}
diff --git a/src/main/java/appeng/parts/misc/ItemRepositoryAdapter.java b/src/main/java/appeng/parts/misc/ItemRepositoryAdapter.java
index 1de85f50d..bcd7886fb 100644
--- a/src/main/java/appeng/parts/misc/ItemRepositoryAdapter.java
+++ b/src/main/java/appeng/parts/misc/ItemRepositoryAdapter.java
@@ -71,13 +71,24 @@ class ItemRepositoryAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<
 
         if( type == Actionable.MODULATE )
         {
-            try
+            if (this.cache.cachedAeStacks.length == 0) this.cache.update();
+            boolean found = false;
+            for (IAEItemStack iaeItemStack : this.cache.cachedAeStacks)
             {
-                this.proxyable.getProxy().getTick().alertDevice( this.proxyable.getProxy().getNode() );
+                if( iaeItemStack == null )
+                {
+                    continue;
+                }
+                if( iaeItemStack.equals( iox ) )
+                {
+                    found = true;
+                    iaeItemStack.incStackSize( iox.getStackSize() );
+                }
             }
-            catch( GridAccessException ex )
+            if (!found)
             {
-                // meh
+                this.cache.cachedAeStacks = Arrays.copyOf( this.cache.cachedAeStacks, this.cache.cachedAeStacks.length + 1 );
+                this.cache.cachedAeStacks[this.cache.cachedAeStacks.length - 1] = iox.copy();
             }
         }
 
@@ -107,15 +118,27 @@ class ItemRepositoryAdapter implements IMEInventory<IAEItemStack>, IBaseMonitor<
 
         if( !extracted.isEmpty() )
         {
+            if (this.cache.cachedAeStacks.length == 0) this.cache.update();
+            IAEItemStack iaeExtracted = AEItemStack.fromItemStack( extracted );
+
             if( mode == Actionable.MODULATE )
             {
-                try
+                for ( int i = 0; i < this.cache.cachedAeStacks.length; i++ )
                 {
-                    this.proxyable.getProxy().getTick().alertDevice( this.proxyable.getProxy().getNode() );
-                }
-                catch( GridAccessException ex )
-                {
-                    // meh
+                    IAEItemStack iaeItemStack = this.cache.cachedAeStacks[i];
+                    if( iaeExtracted.equals( iaeItemStack ) )
+                    {
+                        if( iaeExtracted.getStackSize() >= iaeItemStack.getStackSize() )
+                        {
+                            iaeExtracted.decStackSize( iaeItemStack.getStackSize() );
+                            this.cache.cachedAeStacks[i] = null;
+                        }
+                        else
+                        {
+                            iaeItemStack.decStackSize( iaeExtracted.getStackSize() );
+                            break;
+                        }
+                    }
                 }
             }