diff --git a/src/main/java/com/sk89q/craftbook/mech/BetterPistons.java b/src/main/java/com/sk89q/craftbook/mech/BetterPistons.java
index 82ff18416f..6dd59102f0 100644
--- a/src/main/java/com/sk89q/craftbook/mech/BetterPistons.java
+++ b/src/main/java/com/sk89q/craftbook/mech/BetterPistons.java
@@ -169,8 +169,6 @@ public void onBlockRedstoneChange(SourcedBlockRedstoneEvent event) {
 
         if(type == Types.CRUSH && event.getNewCurrent() > event.getOldCurrent()) {
             PistonBaseMaterial piston = (PistonBaseMaterial) trigger.getState().getData();
-            if(piston.isSticky())
-                return;
             piston.setPowered(false);
             if(trigger.getRelative(piston.getFacing()).getTypeId() == BlockID.BEDROCK)
                 return;
diff --git a/src/main/java/com/sk89q/craftbook/mech/crafting/InvalidCraftingException.java b/src/main/java/com/sk89q/craftbook/mech/crafting/InvalidCraftingException.java
new file mode 100644
index 0000000000..cbd9f21f24
--- /dev/null
+++ b/src/main/java/com/sk89q/craftbook/mech/crafting/InvalidCraftingException.java
@@ -0,0 +1,15 @@
+package com.sk89q.craftbook.mech.crafting;
+
+import com.sk89q.craftbook.util.exceptions.CraftbookException;
+
+public class InvalidCraftingException extends CraftbookException {
+
+    /**
+     * 
+     */
+    private static final long serialVersionUID = 4305166656444438242L;
+
+    public InvalidCraftingException(String message) {
+        super(message);
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/com/sk89q/craftbook/mech/crafting/RecipeManager.java b/src/main/java/com/sk89q/craftbook/mech/crafting/RecipeManager.java
index c3bce4390e..ddcee8699c 100644
--- a/src/main/java/com/sk89q/craftbook/mech/crafting/RecipeManager.java
+++ b/src/main/java/com/sk89q/craftbook/mech/crafting/RecipeManager.java
@@ -5,6 +5,7 @@
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashMap;
+import java.util.Iterator;
 import java.util.List;
 import java.util.logging.Logger;
 
@@ -49,7 +50,11 @@ public void load() {
         List<String> keys = config.getKeys("crafting-recipes");
         if (keys != null) {
             for (String key : keys) {
-                recipes.add(new Recipe(key, config));
+                try {
+                    recipes.add(new Recipe(key, config));
+                } catch (InvalidCraftingException e) {
+                    logger.warning(e.getMessage());
+                }
             }
         }
     }
@@ -83,7 +88,7 @@ public boolean hasAdvancedData() {
             return false;
         }
 
-        private Recipe(String id, YAMLProcessor config) {
+        private Recipe(String id, YAMLProcessor config) throws InvalidCraftingException {
 
             this.id = id; 
             this.config = config;
@@ -92,7 +97,7 @@ private Recipe(String id, YAMLProcessor config) {
             load();
         }
 
-        private void load() {
+        private void load() throws InvalidCraftingException {
 
             type = RecipeType.getTypeFromName(config.getString("crafting-recipes." + id + ".type"));
             if (type != RecipeType.SHAPED2X2 && type != RecipeType.SHAPED3X3) {
@@ -101,7 +106,11 @@ private void load() {
                 items = getHashItems("crafting-recipes." + id + ".ingredients");
                 shape = config.getStringList("crafting-recipes." + id + ".shape", Arrays.asList(""));
             }
-            result = getItems("crafting-recipes." + id + ".results").iterator().next();
+            Iterator<CraftingItemStack> iterator = getItems("crafting-recipes." + id + ".results").iterator();
+            if(iterator.hasNext())
+                result = iterator.next();
+            else
+                throw new InvalidCraftingException("Result is invalid in recipe: "+ id);
         }
 
         private HashMap<CraftingItemStack, Character> getHashItems(String path) {