We use a modified computer table thingie. It actually was in the room that was converted to our shop, and when we were packing stuff for Atlanta we looked at it thinking "wow .. that would make a nice cart". We screwed some 2x4s to the top (to lift the wheels off the cart so it can be driven in the pits for testing) and called it done. You can disassemble it completely, which makes it nice for a tool crate, and it also weighs next to nothing. The 2x4s create a 3" gap between the bot and the top of the cart, for tools and stuff, and the control box fits perfectly on the bottom shelf. This year, we stuck some vinyl decals on it.
Ironically, its the perfect height for getting under doors at competition
Thanks to 973 for taking the picture
