I realized that with a different assembly sequence I could use the C-frame to back rivet both the upper hinge and the top angle to the seat back. This worked out much better than the right side. Then I cleco'd on the side angles and the bottom angle and hinge and used the squeezer to set those rivets. I also used the squeezer to rivet the hinges onto the back braces and cut hinge pins to fit. I used the C-frame again to back rivet the hinges to the right side floor. Once done I cleco'd the floor in place and made two pins for the seat back to floor connection. Put the right seat in for a test fit.