I had Joe Williams, an A-I mechanic, check the front and rear spar assemblies. He pointed out several rivets that needed to be re-done because they had clinched, a condition that was hard for me to spot. Now I have a little better idea what to look for. I used the pneumatic squeezer with the longeron yoke and I think there may be some kind of problem with the yoke, because when I redid the rivets with the 3' yoke the rivets set much better.
