my screws were short as not to come through the fiberglass, the screws in two spots were close enough to the edge of the ply that it broke apart between the screw and edge . I used wood screws into maple should hold well. if not I will go to blind nuts but that will b a lot of work. I'm tired of this high maintenance plane sucking up all my modeling time, I swear its a foamie in disguise?

Joe