I just re-downloaded the Mongoose Traveller Developers package. Seems that some time ago the vehicle handbook design rules were released as Open Game, and have an SRD. I’m not sure how I feel about this. It’s the spaces based version, which I’m not quite sure is fine enough grained for my current project.
Meh, it’s MgT and OGL, so it’s what I will use as the base and not have to worry about stuff.