Are there going to be more uses for Elerium, Antimatter, and Durantium than the Energy Accelerator, Slingshot Booster, and Kinetic Accelerator? It seems to me that they are awfully abundant, then, especially considering that I'm not yet sure if any of those modules are actually worth it. At a minimum I would think that the rate-of-fire boosters should also require the appropriate resource, possibly also some of the higher-end, weapon-specific military starbase upgrades.