I knew that you had more knowledge than me, as I have not heard about OEM replacement wheels for those units with metal gears. As I am learning everything you read on the Internet is fact. My opinion is that buying on line is buyer beware, and then you must find someone to repair it, at Internet prices, when something goes wrong. I have had people come into the shop, ask me what is or could be wrong with their unit, then tell me my parts prices are too high, they’ll get them on line. What would you do if you were standing in my shoes? I may not charge you for my knowledge, but most times I will see your unit down the road. Just like members who come to this forum asking for help or advice and then do one of two things when help is provided. Either tell us we don’t know what we are talking about because they don’t like the answer or use the advice but never come back to give us a simple THANK YOU. Should the techs here stop giving away their knowledge for free because of them. NO, we’ve got thick skin and do this as a service to those who value our expertise. If you don’t like what I say and hate me for saying it, get in the short line. The long line is for grateful members who have been helped and have save money following the technicians answers.