BT3x00 upgraded aluminum fence roller and pin.

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So the eBay seller noteck1 that has the clamper bracket, loaded clamper brackets, machined aluminum miter fence brackets etc... also has a listing for the machined aluminum fence rollers and steel axle pins that they use on the loaded assemblies. You can save a chunk if your clamper is good by just odering the bracket and roller and get them to combine shipping.

https://www.ebay.com/itm/29603652248...Bk9SR4qayMT5Yg

I am not certain if this is going to be a regular stock item, so if you are interested grab em while you can...