diff --git a/Makefile b/Makefile
index 183a338..11be59f 100644
--- a/Makefile
+++ b/Makefile
@@ -24,7 +24,7 @@ copy: link
 	mkdir -p ../$(v)
 	cp -rf * ../$(v)
 	rm -f ../$(v).zip
-	cd ..; zip -9 -r -y $(v).zip $(v) -x "*.xcf" -x "*.git*" -x "*.bak" 
+	cd ..; zip -9 -r -y $(v).zip $(v) -x "*.xcf" -x "*.git*" -x "*.bak" -x "*.blend*"
 
 install: lint-changelog copy
 	cp -f ../$(v).zip ../../mods/
diff --git a/data-util.lua b/data-util.lua
index 36b8f84..e6e7451 100644
--- a/data-util.lua
+++ b/data-util.lua
@@ -1,4 +1,6 @@
--- WARNING - this file will be overwritten, edit bzlib/data-util.lua
+-- WARNING WARNING WARNING
+-- This file will be overwritten in mod zipfiles, edit bzlib/data-util.lua
+-- WARNING WARNING WARNING
 
 local me = require("me")
 local util = {}
@@ -32,7 +34,7 @@ end
 
 -- Add a prerequisite to a given technology
 function util.add_prerequisite(technology_name, prerequisite)
-  technology = data.raw.technology[technology_name]
+  local technology = data.raw.technology[technology_name]
   if technology and data.raw.technology[prerequisite] then
     if technology.prerequisites then
       table.insert(technology.prerequisites, prerequisite)
@@ -44,7 +46,7 @@ end
 
 -- Remove a prerequisite from a given technology
 function util.remove_prerequisite(technology_name, prerequisite)
-  technology = data.raw.technology[technology_name]
+  local technology = data.raw.technology[technology_name]
   local index = -1
   if technology and data.raw.technology[prerequisite] then
     for i, prereq in pairs(technology.prerequisites) do
@@ -61,7 +63,7 @@ end
 
 -- Add an effect to a given technology
 function util.add_effect(technology_name, effect)
-  technology = data.raw.technology[technology_name]
+  local technology = data.raw.technology[technology_name]
   if technology then
     table.insert(technology.effects, effect)
   end
@@ -69,7 +71,7 @@ end
 
 -- Set technology ingredients
 function util.set_tech_recipe(technology_name, ingredients)
-  technology = data.raw.technology[technology_name]
+  local technology = data.raw.technology[technology_name]
   if technology then
     technology.unit.ingredients = ingredients
   end
@@ -351,4 +353,54 @@ function util.add_crafting_category(entity_type, entity, category)
    end
 end
 
+function util.add_to_ingredient(recipe, ingredient, amount)
+  if data.raw.recipe[recipe] then
+    add_to_ingredient(data.raw.recipe[recipe], ingredient, amount)
+    add_to_ingredient(data.raw.recipe[recipe].normal, ingredient, amount)
+    add_to_ingredient(data.raw.recipe[recipe].expensive, ingredient, amount)
+  end
+end
+
+function add_to_ingredient(recipe, it, amount)
+	if recipe ~= nil and recipe.ingredients ~= nil then
+		for i, ingredient in pairs(recipe.ingredients) do
+			if ingredient.name == it then
+        ingredient.amount = ingredient.amount + amount
+        return
+      end
+			if ingredient[1] == it then
+        ingredient[2] = ingredients[2] + amount
+        return
+      end
+		end
+	end
+end
+
+function util.add_to_product(recipe, product, amount)
+  if data.raw.recipe[recipe] then
+    add_to_product(data.raw.recipe[recipe], product, amount)
+    add_to_product(data.raw.recipe[recipe].normal, product, amount)
+    add_to_product(data.raw.recipe[recipe].expensive, product, amount)
+  end
+end
+
+function add_to_product(recipe, product, amount)
+  if recipe ~= nil and recipe.results ~= nil then
+    if recipe.result == product then
+      recipe.result_count = recipe.result_count + amount
+      return
+    end
+    for i, result in pairs(recipe.results) do
+			if result.name == product then
+        result.amount = result.amount + amount
+        return
+      end
+			if result[1] == product then
+        result[2] = result[2] + amount
+        return
+      end
+    end
+  end
+end
+
 return util