I'm looking at the Right Side View on DWG14 and see a note for quickbuilders to user blind rivets to attach flap brace to rear spar. There doesn't seem to be any other mention of a flap brace - no part number either. I searched to construction manual and there's no mention of it there either. Is this the flap gap fairing (W-921) that they are talking about? It would make sense to blind rivet that as the wing skins are already riveted on and would make bucking very difficult.