Removed cleco's; deburred, re-assembled, and riveted control horn to elevator halves. Afterward, as a test, I was able to pull both hinge pins, remove the elevator assy (surprisingly rigid), then re-install with little effort to push in the hinge pins.
Topside Riveted (up on 2x4's, making shadows)
Showing underside; elevator is hanging down, showing hinge & fore edge of elevator