[EricH]

For a simple but reliable cart, I like 330's. https://www.chiefdelphi.com/media/photos/43852 (under the tetra)--note, this is the second one of this design!

The rails slide back and forth to accommodate different robots; "stuff" goes in the mat underneath. The whole thing can be taken apart to bare frame if need be for transport (or if the handle is tripping people in the pit area again).