Thank you!
Just as an exercise* to see if I could break it I looked at engines:
2x Narita-Guo Union LF-1 fusion reactor, 26 MCr, 40 cu, 53 power, 1.2 efficiency.
Would in every way beat
OmniDyne Lines EF-1 fusion reactor, 55 MCr, 84 Cu, 82 power, 1.2 efficiency.
Unless you create a system for...