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these .5 mm shims are available for purchase at my eBay store. if you're running an axial crawler , it is my opinion that you need this upgrade to save your gears if you're running the ar44 axles or the umg 10 6 by 6. Axial is aware of this flaw with their axles, I don't know if they're doing anything to rectify it though, time will tell.
