Hi Eden, thank you so much for joining the conversation. Sounds like you are the kind of person I've been looking for. I've had to speak with Duffy to get any meaningful information about my '83 Duffy, built by W.D. Schock. I've noticed that both their 10" propeller and the 12" seem to be copies of Michigan Wheel's machine pitch and DJ335. I have both urethane props from Duffy, currently using the 12" although it does drive my motor RPM down to ~1500, I am running a different motor, Motenergy ME1305 brushless PMAC. There seems to be a large efficiency improvement from spinning a larger prop at half the speed but it does cause motor cooling issues. I need additional gear reduction past the 2.8:1 ratio, like a Baldor speed reducer gearbox. I am looking for a part that comes from the W.D. Schock era. The curved brass/bronze toe rail chock at the stern of the boat that sits at the corner of the teak toe rails.