I am currently going through the final edit stages of an article for RCU on how to cut the covering for a fuselage where the wing is already glued in place, and will probably help you out along with the many fine suggestions already offered so far in this thread.

The article deals primarily with how to get an accurate cut-out for where the wing meets the fuselage. I happened to use a profile plane as the subject for my article, but the technique would work for planes like the Dazzler too. I'll try to remember to post here when the article does "hit the presses", so to speak.