Could also be done with a set screw, no?
The CDS system does not turn up and down. The dial stays at the same length at all times. I use the set screw system on my older Nightforce scopes without the zero stop and it works perfectly. You could use a set screw, but it would only mark the stop just like the bearing does. The bearing is less work. Or you can epoxy in a 1/16 pin for the same result.
