Mounted the left wingtip to the wing and drilled the #40 holes for the screws that will attach it to the wing. I also enlarged the holes that attach the cap strip to the end rib to #30 holes. My frustration continues with the imperfections on the tip. I bought the wingtips with the landing light mounts. When they were cut into the wingtip and bonded they were not lined up very well. I may have to cut it out, line it up and rebond it, or just reshape it in place. I have a few friends that build surf boards so I'll get their advice before continuing.