Made a start on the inboard bottom wing skin. Didn't really get into it and had to stop early to go to work this evening, but at least we got some done. One snafu caught just in time; I had forgotton to rivet the K1000-06 nutplates to the main spar for the inspection panels. Of course, the wing skins obscure on of the rivets on each outermost nutplate. Luckily we caught this now while we were still able to get access; phew!