Closed up the top with clecos and noticed the left outer skin edge was a little longer that tne right. I measured from the attachment brackets and made both ends the same length and square from the top skin surface. This will present itself to the air symmetrical. While pulling the rivets I tried to pull the rivet gun away from the panel just as the rivet was popping free. No bounces and fairly smooth finnish on the top surface. I wipped it down with Lacquer Thinner to remove the primer from around the rivet heads.