While the wire shape is still flat, it was convenient to refine the soldered area with a triangular file and do a test fit of the bezel.

Sizing can be tricky and the ring turned out too big in the end. But my solder joint turned out so well (the main flaw of my original version was a poorly executed solder joint in this location) that I didn't want to risk mucking it up with a do-over. The idea is to cut it a little too long and then remove further material as you square up the wire ends, and redo the whole process if it is too big (but you can't add more material if you make it too small).

The thick wire was difficult for me to shape with just pliers, so I used a rawhide mallet and bench block to help out. I could have annealed (softened) the shape with the torch, too.