Well for the second time in the grizz's life I stripped the threads out of my inner sheave. I know this is a common problem with these, but has any body figures out what causes the problem. I am currently running 2mm shims with greaseless weights on a moded outer sheave. outer nut did not come loose and was torqued and locktighted in place. With my riding group this is about the fifth inner sheave we have replaced. Not a real big deal but still a pain in the you know where because it let go in about 10' of snow and had to get pulled off the mountain.