7 hrs, 80 rivets
A long, brutally hot day working with fiberglass.
Countersink wingtips for 931 ribs.
Rivet 931 and 916 ribs to wing tips. They turned out pretty good, except for the underside of one, I guess the epoxy was on too thick and it didn't completely squeeze out.
Drill wingtips to #33. Deburr wings, dimple.
Drill wingtips for nutplates.
Start installing Archer nav antennas.
Countersink #40 nutplate holes.