Tanner played his guitar for a while in the shop while I riveted the aileron gap seals to the rear wing spar and the trailing edge of the top wing skin. I squeezed all the spar rivets and a few of the skin rivets. I wasn't happy with how the skin rivets looked so I back riveted all of the remaining ones which turned out better. They are all acceptable, but the back riveted ones are more uniform. On light gauge skins I need to remember to back rivet as much as possible.