My wife and father have been helping me with top skin riveting. It has been going so well that I got ahead of myself and managed to rivet some of the top skin at the rear spar without first dimpling the rear spar. I know I know, how could I have riveted a dimpled surface to a surface that was neither dimpled or countersunk? Anyway, I drilled out the offending rivets and dimpled the top skin and rear spar with my pneumatic squeezer in one operation. I will be more careful on the right wing.