This has probably already been said but in regards to supply, have only planets have unlimited supplies. Bases/Ships can still have components like the quantum reactor, but instead of the supply showing as unlimited, have a finite amount that gets fully recharged every turn. The Quantum Reactor would sill add to the supply pool for the ship/base.
This way, you can't have a small space station being able to refuel and entire 100 ship fleet in one turn, because realistically, where would they all dock? In this case it would take a little longer due to the amount of supplies the station has each turn.
Hope this made sense

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