Invented the wheel or not, but I think I’ve found a good way to fit
the underside of a bezel to the round ring shank.
I bought a set of 24 wooden doming punches/hammers several years
ago. Their diameters range from 11 to 25 mm. Suddenly it occurred to
me that there wouldalways be one that would fit the inner diameter
of the ring I was making. Ijust covered the punch with coarse
sandpaper, and rubbed the underside of the bezel over it until it
exactly fitted the ring. It works! This is after years of suffering.
Hope it works for you too! Irene