I agree with Terry, the jumbo Robart hinge points are the way to go. I drill the hole just barely big enough to get the hinge in. If you put it in, you can hardly get it out due to the barbs. If you were a bit goofy, you might not need to even glue them, that's how good the friction holds them. Then I take a hypodermic that I have drilled out and inject a bunch of the slowest drying epoxy I have. Oil the hinge joint and put 'em in. Then stand the surface or the aircraft up so that the hinge line is below the glue. This allows a pool of epoxy to form where the hinge is sticking through on the inside of the structure. When this cures, it forms a sort of washer that can not allow the hinge to break out. You'll need to destroy the structure to ever get that apart.