I have this same cart and haven't mounted it yet (wasn't sure whether I'd want it on the swivel caster end or the fixed end). May I recommend a sheet of plywood/plastic/stainless (heavier than the cart)? The top of my cart has bowed significantly so I'll wait to mount it until I get a top on there. I'm currently thinking plywood with some mineral oil rubbed in then use a large cutting board on the space between the smoker and the end of the cart.