Deburred, dimpled and primed the two inboard bottom wing skins and cleco'd them in place for riveting. Also drilled and tapped the screw holes in the pitot tube. I had to re-dimple the two skins around the edges because my pneumatic squeezers die's had twisted, and as a result, a very slightly incomplete dimple, so that slowed me down a bit. Then I came up with a plan on riveting the bottom skins, and got a few rivets in the left wing inboard skin. Looks like it's fairly dooable solo, but I may recruit some help for some of the tougher rivets.