Finished up fitting the Left wing tip, and then match drilled the tip from the skins, and riveted nutplates to the wing tip, then reinstalled the wing tip using the #6 screws. i've got a little bulging/puckering between some of the screw holes, I think that part of the problem is in the skin dimples, I need to grind one side of the female die so that i can get it closer to the rib and go back and redo the dimples, hopefully that will make a difference. ,....... Live and learn.