I did leave the wheels off, but used the Harbor Freight cart (without plywood topper). I don't have it bolted down yet because I wanted to be sure if I wanted it on the swivel wheel end or the fixed wheel end. There's a 2" lip going into my storage closet (apartment living) and I haven't had any instances where it felt remotely close to tipping or sliding off. I could see concern with it sliding off if it weren't bolted on when going over grass or some other rough terrain, but it's pretty stable.