The same when I decided to make retractable landing gear on a model that only included glued-in-place ones (plastic modeling but much of the ad-lib work is similar). I put a length of the plastic tree into the drill chuck and shaped/sized its diameter with a file (for the strutwork). The Corsair(F4U) was more difficult because its struts not only had to fit in a shorter space when retracted but turn to the side, as well, and even 1/48th scale is limiting.What's really time consuming about this is the design work. You're never sure you've designed a part correctly until you fit it in place, and fit all adjoining parts to it. That's part of the fun though.
Found anything for your canopy yet?






