Deburred, dimpled and clecoed the top outboard skin in place. Before installing the skin, I back-riveted the aileron gap fairing to the skin. There is enough room to get under the gap fairing to buck the skin to rear spar rivets later. This way I didn't have to use any blind rivets.
In the last picture, you can see that I ended up with a slight sag in the wing. The string runs end-to-end along the spar. At the center there is about 0.050 sag. I have known about this for some time, it is not a significant amount and won't impact the control of the aircraft later.
