Yep Art, that Home Depot available cart makes a most excellent robot cart. How do I know? We used one last year.
What we did was put some 2x6's around the edge, which the frame of our robot rested upon, allowing our wheels to spin freely, should they decide to begin rotating during testing in the pit. We'll most likely use it again this year. Also, this cart dissasembles very easily to stuff into a crate, and takes spray paint very well. Now to only find a segway...
