Hi all, I added some history info on the Cosmos PTO VFO to our website, r-390.net. Here's a direct link to the history selection page: https://www.r-390a.net/R390A History.htm and to the Cosmos info: R390A Cosmos PTO History.pdf (r-390a.net) <https://www.r-390a.net/R390A%20Cosmos%20PTO%20History.pdf> Enjoy. Regards, Larry