Just a late follow-up. Mark built a system for me utilizing the Automation Direct DURApulse GS 20 series GS21-22 PO VFD I had purchased before I read his posts. This VFD was significantly different from the standard unit Mark has recommended, but he offered to figure out the programing rather than have me try to return it and purchase the other unit. I'm sure it was a lot of additional work on his part to get everything working. Mark sent me instructions and after cowboying up, my part was comparatively simple due to the extensive photos, detailed instructions and email questions answered. I've been using the lathe for a few weeks now and everything runs exactly as it should. Can't thank Mark enough for his time. I'm in a happy place - Thanks Mark!