RE: GP Waco?
I got in a few flights on mine today. When I was putting it together, one of the blind nuts came loose in the wing. The ones where you bolt the angle brackets down that hold the outer wing braces. I was able to get to it through the servo hatch. I had to cut through some sheeting on the wing spar,from inside the servo hatch, to access it. A royal pain but I was able to do it at the field. The nut had very little barbs on it and was turning with the bolt.