Primed the VS ribs. Clecoed the ribs to the front spar. Clecoed the rear spar together. Finally FIRST RIVETS! I started with the flush rivets in the bottom of the rear spar. I used the flush rivet set in the gun and the flush rivet plate to buck. Worked great. I used the Main Squeeze on the rest. You have to really pay attention to the rivet call outs here. Glad the instructions said to use tape on the holes you don't want to do until later. It would be real easy to get going and do them all.
