https://www.ebay.com/str/predatorparts
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.
