The shame about Metal and Stars is that its quite the hulking beast of a mod, with a number of dependancies that don't feel like they need to be there.
Considering when Overclock modules, or a number of other useful tech such as liquid (nuclear) rocket fuel fluids is unlocked and used before travelling to the actual other planets part of Metal and Stars, etc. It would be far nicer to have these as their own modular parts, so when something external breaks, you aren't stuck with half your base wiped/empty of several entities.