Murray,

On all of the front-focus folders I have played with, the 'beauty ring - focus scale' is held onto the front cell with 3 set screws so it can be repositioned. They are tiny, use your loupe to find them. It may be easier to sharp focus at 25 feet and set the scale to that then check for inf.

It is easier to set the lens to inf., remove the ring and count how much of a turn to move the cell all the way in. Clean it and replace it all the way in and turn it out that far.

Good luck with it.