Started early Sat morning (7am) getting everthing setup to squeeze the rivets in the spars. It took me about 2 hours to squeeze all the rivets in one spar. All the revits were preloaded in the spar and I applied blue painters tape to hold them in place. The squeezer Dan loans out works great:) Thanks to Dan and crew for providing squeezer. I finished riveting both spars up before lunch.