I continued counter sinking the top skin locations. Dimple the rest of the screw hole locations. Bob Eggleston stopped by and helped with a couple of difficult hole locations along the front of the fuel tank skin. Eventually, he had to bring his hand squeezer. I could not fit the pneumatic squeezer to dimple the holes. He also lent me 4 MS21053-L08 platenuts. I had to use these at more locations than called out in the drawing. I started drilling the rivet holes for the platenuts.