Clecoed the rudder skins to the skeleton. Using my pneumatic squeezer, I riveted the 12 AN426AD3-3.5 rivets that hold the counterbalance skin to the skin referencing drawing DWG 7. Then I squeezed 6 AN426AD3-4 rivets that attach the counterbalance skin and rudder skin to the spar. I substituted cherry max rivets for the two LP4-3 blind rivets that attach the tip rib to the spar.