If I could figure out a way to mount an engine, I could drive this mobile base to work! This product is very heavy duty. I used it without the rails by drilling holes and lag screwing it directly to the bottom of an 8' long rack that carries my sheet stock and, fully loaded, it moves around my shop like a shopping cart. As always, it shipped in a sturdy box, and arrived in perfect shape and faster than I expected. I can always count on Rockler for the best products and fast shipping.