I noticed that Alternate Recipe: Steel Screw and Alternate Recipe:Plastic are less efficient than their original recipes. You end up using more iron ore (in addition to the introduction of coal) and more crude oil, respectively. I was under than the impression that alternate recipes exist to craft items more efficiently for the tradeoff of having to use less common ores or more complex parts. They should get another pass for balancing. As they stand, they are only useful for recycling unused parts.