diff --git a/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/autocrafting/task/CraftingStepProcess.java b/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/autocrafting/task/CraftingStepProcess.java
index 79ebd9879..b4a5a83b1 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/autocrafting/task/CraftingStepProcess.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/autocrafting/task/CraftingStepProcess.java
@@ -59,7 +59,7 @@ public class CraftingStepProcess extends CraftingStep {
 
             items.undo();
             fluids.undo();
-            return insertSimulation(inventory, toInsert);
+            return insert(inventory, toInsert, true);
         }
         return false;
     }
@@ -67,17 +67,17 @@ public class CraftingStepProcess extends CraftingStep {
     @Override
     public boolean canStartProcessing() {
         IItemHandler inventory = getPattern().getContainer().getFacingInventory();
-        return inventory != null && insertSimulation(inventory, new LinkedList<>(getToInsert()));
+        return inventory != null && insert(inventory, new LinkedList<>(getToInsert()), true);
     }
 
     @Override
     public void execute(Deque<ItemStack> toInsertItems, Deque<FluidStack> toInsertFluids) {
-        List<ItemStack> actualInputs = new LinkedList<>();
+        LinkedList<ItemStack> actualInputs = new LinkedList<>();
         int compare = CraftingTask.DEFAULT_COMPARE | (getPattern().isOredict() ? IComparer.COMPARE_OREDICT : 0);
         if (extractItems(actualInputs, compare, toInsertItems)) {
             IItemHandler inventory = getPattern().getContainer().getFacingInventory();
-            if (insertSimulation(inventory, new ArrayDeque<>(actualInputs))) {
-                actualInputs.forEach(stack -> ItemHandlerHelper.insertItem(inventory, stack, false));
+            if (insert(inventory, new ArrayDeque<>(actualInputs), true)) {
+                insert(inventory, actualInputs, false);
             }
         }
     }
@@ -90,25 +90,26 @@ public class CraftingStepProcess extends CraftingStep {
     }
 
     /**
-     * Checks whether all stacks can be inserted or not
+     * Insert or simulate insertion of {@link ItemStack}s into an {@link IItemHandler}
      *
      * @param dest   target {@link IItemHandler}
      * @param stacks a {@link Deque} of {@link ItemStack}s
+     * @param simulate simulate or actually insert the {@link ItemStack}s
      * @return true when all can be inserted, false otherwise
      */
-    private static boolean insertSimulation(IItemHandler dest, Deque<ItemStack> stacks) {
+    private static boolean insert(IItemHandler dest, Deque<ItemStack> stacks, boolean simulate) {
         ItemStack current = stacks.poll();
         List<Integer> availableSlots = IntStream.range(0, dest.getSlots()).boxed().collect(Collectors.toList());
         while (current != null && !availableSlots.isEmpty()) {
             ItemStack remainder = null;
             for (Integer slot : availableSlots) {
-                remainder = dest.insertItem(slot, current, true);
-                if (remainder == null || current.getCount() != remainder.getCount()) {
+                remainder = dest.insertItem(slot, current, simulate);
+                if (remainder.isEmpty() || current.getCount() != remainder.getCount()) {
                     availableSlots.remove(slot);
                     break;
                 }
             }
-            if (remainder == null || remainder.getCount() <= 0) {
+            if (remainder == null || remainder.isEmpty()) {
                 current = stacks.poll();
             } else if (current.getCount() == remainder.getCount()) {
                 break; // Can't be inserted
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/integration/jei/RecipeTransferHandlerPattern.java b/src/main/java/com/raoulvdberge/refinedstorage/integration/jei/RecipeTransferHandlerPattern.java
index 6323db35d..e4b76262d 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/integration/jei/RecipeTransferHandlerPattern.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/integration/jei/RecipeTransferHandlerPattern.java
@@ -1,7 +1,6 @@
 package com.raoulvdberge.refinedstorage.integration.jei;
 
 import com.raoulvdberge.refinedstorage.RS;
-import com.raoulvdberge.refinedstorage.apiimpl.API;
 import com.raoulvdberge.refinedstorage.container.ContainerProcessingPatternEncoder;
 import com.raoulvdberge.refinedstorage.network.MessageProcessingPatternEncoderTransfer;
 import mezz.jei.api.gui.IGuiIngredient;
@@ -12,8 +11,8 @@ import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.item.ItemStack;
 
 import javax.annotation.Nullable;
-import java.util.LinkedHashMap;
-import java.util.Map;
+import java.util.LinkedList;
+import java.util.List;
 
 public class RecipeTransferHandlerPattern implements IRecipeTransferHandler<ContainerProcessingPatternEncoder> {
     @Override
@@ -25,32 +24,21 @@ public class RecipeTransferHandlerPattern implements IRecipeTransferHandler<Cont
     @Override
     public IRecipeTransferError transferRecipe(ContainerProcessingPatternEncoder container, IRecipeLayout recipeLayout, EntityPlayer player, boolean maxTransfer, boolean doTransfer) {
         if (doTransfer) {
-            Map<Integer, ItemStack> inputs = new LinkedHashMap<>();
-            Map<Integer, ItemStack> outputs = new LinkedHashMap<>();
+            List<ItemStack> inputs = new LinkedList<>();
+            List<ItemStack> outputs = new LinkedList<>();
 
             for (IGuiIngredient<ItemStack> guiIngredient : recipeLayout.getItemStacks().getGuiIngredients().values()) {
                 if (guiIngredient != null && guiIngredient.getDisplayedIngredient() != null) {
                     ItemStack ingredient = guiIngredient.getDisplayedIngredient().copy();
-
-                    int hash = API.instance().getItemStackHashCode(ingredient);
-
                     if (guiIngredient.isInput()) {
-                        if (inputs.containsKey(hash)) {
-                            inputs.get(hash).grow(1);
-                        } else {
-                            inputs.put(hash, ingredient);
-                        }
+                       inputs.add(ingredient);
                     } else {
-                        if (outputs.containsKey(hash)) {
-                            outputs.get(hash).grow(1);
-                        } else {
-                            outputs.put(hash, ingredient);
-                        }
+                        outputs.add(ingredient);
                     }
                 }
             }
 
-            RS.INSTANCE.network.sendToServer(new MessageProcessingPatternEncoderTransfer(inputs.values(), outputs.values()));
+            RS.INSTANCE.network.sendToServer(new MessageProcessingPatternEncoderTransfer(inputs, outputs));
         }
 
         return null;
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/tile/TileDiskManipulator.java b/src/main/java/com/raoulvdberge/refinedstorage/tile/TileDiskManipulator.java
index 1c8ed949b..62a39f453 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/tile/TileDiskManipulator.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/tile/TileDiskManipulator.java
@@ -366,7 +366,7 @@ public class TileDiskManipulator extends TileNode implements IComparable, IFilte
         FluidStack extracted = null;
         int i = 0;
 
-        do {
+        while (extracted == null && storage.getStacks().size() > i) {
             FluidStack stack = storage.getStacks().get(i);
 
             while (stack == null && storage.getStacks().size() > i) {
@@ -376,7 +376,7 @@ public class TileDiskManipulator extends TileNode implements IComparable, IFilte
             if (stack != null) {
                 extracted = storage.extract(stack, upgrades.getItemInteractCount(), compare, false);
             }
-        } while (extracted == null && storage.getStacks().size() > i);
+        }
 
         if (extracted == null) {
             moveDriveToOutput(slot);