Could someone explain why a sphere is optimal? It seems to me that no matter where you put the reactor in a sphere, the reactor you end up with will always produce less power than a reactor in a ship with some kind of long shape (cylinder, prolate spheroid, or prism of any kind) of identical volume and/or mass, because stabilizers only care about a single dimension. Which, I would assume, means less DPS, less thrust per weight, less shield regeneration, and less... everything... for your trouble.