My main plan is to build a small craft constructed by a TL7-8 society in their C-class Starport and I wanted to keep with things at this TL point that are grounded with things we have today. In effect I'm modding the Antique Shuttle from High Guard into something with a bit more... oomph

The shuttle uses a chemical plant, why not give the craft a fusion plant instead? Its faaar more efficient... What TL would fusion plants be feasible in a game? I was looking for some actual realism here, so if we cannot have fusion plants today (if someone could explain more, that'd be awesome), where are we for other options?
Anyway, I'm hoping to boost Thrust to 4 and have alot of room donated to fuel to make it's velocity greater and it's coasting a little shorter. A functional interplanetary shuttle so to speak, based around inner system travel.
Thanks in advance for all the help
