Alright, so. NoCam helpfully linked me to the sourcebook for Rogue Trader, which is very, very close to the 40K rulebook I've been using, but far more in depth.
I'm at a bit of a crossroads here as to how to proceed with FTL.
Really, the big question here is this - do you guys wanna continue with FTL as it sits, add mechanics, or drop it and run actual Rogue Trader in the 40K universe (which we're all more acquainted with as FTL pretty much exists in my head)?