I have run a plastic skid plate from Hubs Performance or MM Sports on all of my Proclimb sleds. He doesn't charge much for them and all of the holes are already in it for mounting. Just drill out some of the rivets that are there and rivet the skid plate on. You should have a plastic plate because if you hit a rock or something sharp it will slide off it. If it is aluminum it has a tendency to grab ahold of whatever it hits. Have you ever tried to slide something sharp across a piece of aluminum? If you have you will know what I am getting at. They look similar to the one pictured of the aluminum tread plate.