Ken Cabbage (A&P and one smart dude!) stopped by again today to check out our construction. He went through everything with a fine tooth comb and found about 25 rivets to re-do. (Well... at least it's an improvement from last time.) He gave us some more helpful hints.
Hints - Lining up the squeezer - CENTER the plate doing to squishing on the rivet. (It works!) Hold the tip of the rivet gun while driving round headed rivets.