NCC 1701D Enterprise (TNG) (Removable Saucer)

Remix of the model by nd4spd1919

fixed all open manifolds and nasty stuff
split the saucer into 2 for easier printing (included 1 piece too)

i printed it successfully by:
- standing the drive section upright (nacells at the bottom) with supports and a larger raft for better adhesion
- putting the the flat "cut" saucer sections bed down, with a few supports for the mating section (between the drive section and the saucer); no raft required for this one

I'm not sure how best to print t