Well, in regards to exterior colors... personally, I was going to go with the standard TOS shuttle color system, because I'd like to keep consistent with what we saw on TOS. The only real deviation I can see, that's kinda giving me issues, is the fact that there is no place for the "big" NCC number, like on the Galileo... the only place to put it is on the nacelle, and that seems a bit redundant on this shuttle in particular, because the nacelle is so much closer to the Starfleet pennant on the side.