IC2 Classic Tweaker
Some machines from IC2 Classic have limited recipe customization options through JSON, while others don't provide any modification methods at all except through code. This mod is specifically designed to make modpack developers' work easier by providing additional customization tools.
Currently, customization of 5 specific IC2 Classic machines is supported, since the rest are already covered by IC2 Tweaker functionality.
Documentation is available on GitHub, where you can also find an example script file with all public methods.