Have an update. Powerhead arrived today with FedEx. 2019 model, cylinder looks all shiny from the outside.
Was hoping to check it over, but had to help my 87 yo neighbor replace the water cutoff valve he managed to bust earlier this afternoon and was trying to repair. After 3 hours in the 107 degree heat, they have water again, but I don't think I'm gonna be cutting any cookies tonight. Hopefully tomorrow.
Thanks again to everyone. I mostly lurk, learn and laugh here, while I don't have much to contribute, yall have always made me feel welcome. That is truly appreciated.