I need to move some engines around. I used to cut down supermarket shopping carts to hold my Pontiac V-8's but they are mostly plastic these days. I tried a Harbor Break dolly but the cheapola wheels lost their bearings almost immediately. I see some at Home Depot and Lowes. Any good? I used to borrow great dollies from a moving guy and they rolled smooth as butter. But he is long gone now. Any idea where movers sourced their heavy duty dollies? If I made my own what company makes those heavy duty swivel wheels?