I spent the day with Sean riveting the top skins onto the left wing. We used an extended offset set on the rivet gun and a large bucking bar on the manufactured head. (Back riveted). This gave us a very nice top side but I didn't like the tail end of a lot of them. We went back with a small Tungsten bar and a standard flush set to touch a lot of the shop heads up. I took the time to mark the rivet holes as to what rivet size it called for before we got to work. This saved us time while riveting, not spending so much time referring to the plan. We removed the wing from the fixture and put it on my work table. Next step is to install the aileron brackets.