Pygmy- Thanks for posting pics. That's exactly what I use. Sorry no pics from me but just been busy with kids- finishing winter sports, starting baseball, girl scouts, hunter safety, etc...
The globe sight is a bit wider at the base than my ramp but it holds steady. I have been using this setup for about 8 years now.
Sabot loader is correct on the Lyman 57 rear sight being made for select guns. I would think a good gunsmith could drill and tap most receivers to use it. Just would want to make sure the diameter matches close enough to attach securely, and mount on appropriate side of gun for bolt clearance.