Hey folks, I put a 1/4" thick x 28" wide aluminum disc under my WSM's feet yesterday. Stiffens the whole thing up dramatically for moving across rough pavement, etc. Used 4 heavy duty swivel casters (2 locking). Also picked up this cover from Amazon. Fits perfectly, is water resistant, and has enough room for when I add handles, a hinge, etc. I got the large size. Also has draw cord at bottom. Here's the Amazon link: https://www.amazon.com/gp/product/B07NFTF462/?tag=tvwb-20