Luke and I riveted most of the top line of rivets for the inner wing skins. Removed the clecos and taped the second set of rivets into place.
Used a squeezer to rivet the bottom of the skins to the spars. I had to use a flush riveting hammer and a bucking bar for the most inboard portion of the bottom row as there was a brace reinforcing the spar that precluded the use of the squeezer.
Finished the top row when Luke came home in the evening.