Brian and I got the horn riveted in place. The rivet squeezer wouldn't fit inside the horn, so we had to drive the rivets with the gun. I was barely able to get a small tungsten bucking bar inside the horn. The rivets all set nicely.
The rivet squeezer worked nicely for the leading edge of the rudder, as well as the bottom edge. We had to revert back to the gun for the top rib as the squeezer wouldn't reach.
The lead counter-weight was bolted in place. The top rib is ready to rivet into place.