Save yourself the trouble of uncovering and gluing the belly pan. Just place a thin, VERY thin bead of silicone caulking on the belly pan, then place it on the covered wing.

I use silicone caulking for almost every non-structural item on a bird (sealing throttle lines, securing pilots, canopies, etc.). It's cheap, works like a charm, and can be removed if needed. The problem is putting too MUCH on. It takes just a very little silicone to secure ANYthing. Give it at least an hour to cure.

I put a toy Dalmation (four legs with less than a quarter inch space on each of four paws) inside my Can-Do 60. I augured in the Can-Do, but the Dalmation is still there, awaiting the resurrection of the airframe--canopy is unharmed, unmoved--and the airframe around the canopy is undamaged, making me think the silicone actuall ADDS some structural flexibility and strength to the whole. Not one of my pilots under the canopy has EVER come off--and though I don't crash any more, I don't crash any less, either. Think about it.

Jack