Hey! I noticed that you have a setting enabled by default that unlocks advanced metallic asteroid crushing early. I haven't tested things yet, but I did happen to make a mod called Cupric Asteroids which was an alternative approach to solving the same problem. What your thoughts are about how to handle both mods being installed? I'm currently thinking of updating my mod to increase ore output from crushing cupric asteroids a la your change to metallic asteroids, and adding a setting to choose a different byproduct from advanced metallic asteroid crushing.
I'm also curious if you'd be interested in making cupric asteroids a potential dependency. I do think that making players decide between normal and advanced crushing to satisfy copper demand is an interesting challenge in its own right, so I'd have to test it out to figure out my thoughts.