George, you could make a bezel tall enough to settle on the cuff by
filing the bottom of the bezel to conform to the cuff. If you do
this, make the bezel heavy, maybe 24 or 22 gage. Or you could drill
the seat as you described and then strengthen the cuff from the
inside with two “splints” on either side of the mount with round wire
or a ring of round wire on the inside of the cuff around the mount.
Anyway, two ideas to think about.
Sam Patania, Tucson