Thank you, MetalDesigner, for the simple yet useful idea.

A couple of modifications I think I will add to my version is to sacrifice a "C" clamp, which has acme threads (they're much better for repetitive, higher force loads), and a swivel pad, which can be welded to the angle "pusher". The female threaded part of the "C" clamp can be cut from the rest of the frame and provides more threads than an nut to distribute the load.