Today, I riveted the top rear and leading edge skins to the spar. I then riveted the end ribs to the spar and the rear top skin. The leading edge top skins have been riveted and the aileron mounts have been bolted to the spar and torqued to the correct value. The rear most rivet hole in the rear top skin was drilled and countersuk for a CS4-4 blind rivet. I did this because I cannot get my hand squeezer into the small gap in the trailing edge of the aileron rear skin.