RE: Vectorflight Edge 540 build
Chris
The way I did my belly pan is really easy and only needs two screws. I kept some of the forward verticle bulkhead of the belly pan attached. I had to trim a little at the corners where the rails at the bottom of the fuselage pass, but I kept about half of it. This portion is going to pass over the fuse bulkhead behind the landing gear. I drilled a hole in that bulkhead through the front surface of the belly pan where that little dimple is at. I backed up the hole on the inside (aft side) of the bulkhead with a piece of 1/8 ply. I cut about a one inch piece of carbon fiber arrow shaft and after drilling the fuse bulkhead and the front of the belly pan to fit, glued the arrow shaft in so about 3/8 of it protrudes in front of the bulkhead. I slid the belly pan over that, and secured the aft end of the belly pan with a small screw into the fuse bottom edge rail. One trick that makes it even a better fit is if you go to an archery store and buy a few used carbon fiber arrow shaft. Some have a small aluminum ferrule at one end that has a taper on it. That is the end I had protruding forward so the hole in the belly pan fits very well. It holds the front on securely, and is easily removed to get to the wing bolts.
bob