Fitting tanks, top skins

Today I had planned on riveting the top skins on the left wing, but I didn't quite get there. I started with fitting the fuel tanks by bolting the attach brackets through the spars. Then I started installing the screws that attach the tanks skins to the outter leading edges and the spars. At this opint, I realized I was covering up some holes that needed rivets, but didn't have them! The tanks came off, I installed the rivets, then reinstalled the tanks. After both tanks were installed with all of their screws and bolts, I clecoed the top skins in place and called it a day.