Quote Originally Posted by tooly View Post
I wonder if the shim could be held by a revolving pressure pad on the tail stock, I have used this method on thicker materials. Some care would have to be taken with thin shim stock.
That or bolting the shim stock to the end of the bar with a small headed fastener and a thick backup washer, perhaps one for each cut diameter. Elsewise the shim will "bulge..."

Thin shim washers can be an important part when stacking up to a tolerance, good to have multiple ways to make them.