This was the most difficult part of the project to date. I used a piece of aluminum angle to set the edge straight. I drilled every other hole and clecoed it to the edge. In the skin holes that didn't have a matching angle hole, I put a rivet with the flush head up against the angle. I then used my squeezer to squeeze the rivet about half way. I took the angle off and finished the rivets using a back riveting plate. I then went back to the holes without rivets and sqeezed each rivet about half way with the sqeezer and then finished them off by back riveting. The edge isn't perfectly straight, but it's well within tolerance.
