Agree that Sinclair makes/sells fine tools. Expensive too. Far more than I wanted to spend just to clean up a few necks.
I settled on the Forster HOT-100 hand held neck turner, most features at a more reasonaable cost from MidwayUSA. Carbide cutter, easy to set and use micro-calibrated screw (.001") for the cutter, inexpensive pilots. Don't much like the plastic shell holder device but it works fine.