I believe in the ultimate freedom of the end user, thus EVERYTHING in this mod is configurable.
You can change most settings, and all recipes by copying gendustry-tuning.cfg and gendustry-recipes.cfg from the JAR (in assets/gendustry) to your config folder and editing them.
Note that you will need to manually update them for future versions, no automated merging of configuration is possible.
Documentation of the format is a WIP, but it should mostly be understandable