This is the pad I'm adding. It's just some thick plastic (left over from another project) which will keep the steel stay arm from touching the Magnesium case, and abrading it. I don't expect it to last forever, but then, I don't expect the t-case or truck to last forever, either. This should outlast both of them. At worst, it'll slow down the wear so it takes several years just for the steel to start touching the case again. It's about 3x as thick as a scrap from an antifreeze jug, but anything is better than nothing.