Installed 8 flush rivets and 11 round head rivets in HS assembly. Had to experiment to find the right combination of sets and washers for the flush rivets. The pneumatic squeezer has a tendency to not leave the shop head parallel to the spar surface unless particular attention is paid to making it do so. I think this is because there is a bit of play in the set holder. The round head rivets required the cup set and the 5/16 flush set with 1 thick washer and 2 medium washers. The flush rivets required the 1/2" x 1/16" flush set and the 3/8"flush set with 1 medium washer. This with the longeron yoke. I think I need a 4" yoke to make squeezing more of the rivets possible.
