Gotta agree (wish they made them for arched arms somehow). I'm not a fan of aluminum guards. They are noisy, grab onto rocks and don't slide, and dent/tear which can reduce their effectiveness for the next time. UHMW (like futv uses) on the other hand is just the opposite...slides over rocks, doesn't dent or tear, and doesn't seem to ever wear out. I have heard claims of people tearing through UHMW skids but have yet to see one yet...not saying it can't happen, but I haven't seen it