It's a big universe out there, and there are other ways to leave the solar system. Several new destinations with new machines, technologies, and unique processes
A recipe in Age of Production, Core Mining, requires a crusher to be placed on a planet, and modifies the crusher's building prerequisites to allow it. The tooltip says the crusher is modified by AoP, Metal and Stars, and Maraxsis. Could it be this mod overwrites the modifications to the crusher?
