I recently picked up a 1992 Santana Vision with an unfortunate mix of components including a 9-speed Deore shifter mated to a 7-speed cassette on a Hadley hub. I'd like to move to a 9-speed cassette, but I have my doubts that it will fit on this hub. Adding to the uncertainty is the fact that the wheels are mismatched, so I'm not sure if either is original, and there is no model number on the hub.

I did manage to find similar discussions in the archives at tandem@hobbes, and it looks like the cassette body can be replaced and mated with a Ritchey lockring to ensure full thread engagement. Does that sound like a reasonable upgrade with this hub?