I prefer the the drill and tap method myself. Never had a failure. I did find something neat at ACE hardware I wanted to share with you guys. It is a blind nut without the spurs. It has a flat flange with holes drilled around the edge for small screws. A 1/4 scale arf I bought already had the holes drilled. They were to big to thread. Since the canopy was still off these were easy to attach and have worked great.


David