Getting back to work on the horizontal stabilizer, I decided to assemble the rear spar. You may recall one of the things I didn't like about the original rear spar was I put the manufactured head on the thick bars. Since then I've learned that it is customary to put the shop head on the thicker material, so since I had the HS apart, I wanted to do that. Of course I forgot about that until I had squeezed a couple rivets, so out came the drill to drill these two back out. Sigh.

The squeezer did a nice job of squeezing these rivets uniformly.

Afterward, I installed the hinge brackets.