Oops!
Sorry, the servo mounting is exactly like the 4*60 I just built, so, like you said, it is a standard. My only slight issue with it on the 4*60 is that you end up having to use a longer servo arm, which in turn means my ailerons are real sensitive - even connected to the outside hole on the control arm. (I have them on about 70% dual rate, so maybe this is a good thing?) It also probably takes a bit longer than surface mounting them.
The machine guns look great! If I do them, then your idea of creating an extra hatch sounds like the way to go.
I never thought of using clear ???-kote to attach artwork. I am no artist, but there is the Internet after all... What adhesive did you use?
I used these on the Sweet Stick:
http://www3.towerhobbies.com/cgi-bin...EARCH=STICKERS
Whatever might have came with the kit, I had lost long ago.