I riveted aluminum strips into my end ribs and put in nutplates. My wingtips are drilled and attached with
screws to the strips. The sloppy mess with the glass in the wingtip is typical of all the parts I got from
Skystar when I built mine. I would never try to bond to the polyester resin with 3M 2216 or Hysol, because
I don't think it would hold.

Jeff