Thank you guys.
Regarding the nav dome, there is a bug in the skin there. If you look at an AH C-47 from below, you can see a black circle where the base of the dome would be. It looks to me like they intended the black circle to be visible from above, but got it mixed up somehow. As that area of the skin is stretched, I can't add a black circle onto the skin itself and the dome just reflects whatever colour is below it. Guess I could extend the Olive Drab up from the side of the fuselage to cover the dome area though.