Since the wing tip has so much play in it I made sure when I did all of the drilling and as much of the riveting as possible while the tip was clecoed to the wing to keep everything in alignment. I was able to squeeze the aft most rivets while the tip was on the wing but then I had to remove the wing tip and finish the forward rivets on the bench.
Aft section of left wing tip rib riveted to fiberglass tip while installed on wing
I had to remove the wing tip and set the forward rivets on the bench