The instructions say there is enough room to rivet the completed leading edge wing ribs to the spar. I can see getting to the two outermost ribs, and maybe the next most outboard through the spar hole. But how the heck can you rivet the others? I can get my hands down there, but how do you find a rivet, and keep a bucking bar on a rivet if you can't see it? Just wondering what others did. Pulled rivets instead?