Shaped Charge 1: The mount decreases the range of drone warheads to 0 (or -9).
Engine Governor: There is no difference between engine governor I and II. The second Version only costs more, but doesn't provide a better protection.
Engine Tuners: These things are powerful! They increase the speed of a monitor from 2 to 7
Oh, and the engine tuner 2 provides 2 bonus movement points, engine tuner 3 4 movements points. I don't know whether that is deliberate or not.
Btw, has anybody gotten the sprint xo missiles to work correctly yet??