I set the first rear spar rivet with the squeezer while the spar was on blocks on the floor. This proved to be an awkward set up with a lot of bending and stooping to get the squeezer set correctly on the rivets. I moved the spar onto a temporary table on sawhorses and this was a much better work location. Squeezing the -4 diameter rivets with the Cleaveland hand squeezer took some "oomph" but they all went very well. I used the flange-nose yoke and had no problem accessing any of the rivets. Put the spar back in the wing stand at the end of the session.
Began work on the right wing by removing the rear spar, deburring all the holes and scuffing with scotchbrite to prepare for priming.