Spaceships 2-8 new drives

[PTTG]

I'd adjust the numbers given in Spaceships if you're representing EMdrives or some other part of that crowd. A (supposedly working) TL 8 Microwave Cavity drive probably has something like 0.01G per system; they cost as much as a Rotary reactionless drive. A TL 8 superconductiong one requires extra radiators and provides .1G per system, and costs as much as a Standard drive. TL 9 and up superconducting drives do not require significant additional radiators and provide .2G per system.

Presuming the hype is correct, of course.