RE: Building the original Byron P-51 Mustang
Here are a couple of vids of constructing the aileron servo pockets. Part one shows how the wing fits to the fuse.
part 1:
http://www.youtube.com/watch?v=Mg7ETz0YQq8
part 2 and 3:
http://www.youtube.com/watch?v=vIYe_iDeBEE
part 4:
http://www.youtube.com/watch?v=19lRtamjOCU