that is indeed the question....rocks/dirt or something.
i checked my mesh every run, in hopes of not stripping a spur, and yet it happened
anyhow, i think i might be good to go, im hoping the screws dont need a nut on them, cause there no room for the nut, with the screws im using (aluminum)...but epoxy would be permanent so i would have to machine the spur off should it strip, and theres the risk of the epoxy gluing it the diff shut so it cant be opened at all...[EDIT]the more i think about the more i want to use epoxy, i will just put some oil on the diff housing so the expoxy cant adhere to it
i used the holes that was already in the AE spur...cross my fingers that it doesnt fail...im still debating if i should epoxy it on just to be sure