As for the wear ring, I’ve never changed one but I spend a lot of time looking through old threads and you tube videos and I’m seeing Delrin for wear rings a lot. I would stay away from the metal wear rings, aluminum I think. Yes, the impeller tool is not expensive at all. Looked further into the video I attached to my earlier post and I see that there is a special tool for pressing in the bearing and seal. Looks like the tool is about 150.00 most places but on about 80.00 at Bay Area Powersports. I’ve seen on here Mikidymac saying that, that tool is not needed and that you can simply press the bearing and measure but I know for myself, for 80.00 I will be buying the tool as the tool is designed so that the bearing can only be pressed to the correct depth.