I did do the swap. I ended up with the advance adapters kit. I liked it and ran it for about a year and a half. It was easy to do, once I got all the parts. Between AA and Novak conversions, either one would work but they only make them in production runs and I had to wait to get parts for several weeks. AA was the first to have a kit available. I have since rolled the Sprag in the 727 and broke several other parts inside. So, I replaced it with a th400.