[nnfuller]

Not sure what your frame looks like but I would be a little worried about the torsional load on that piece of bar stock. If your wheels are cantalievered, remember they work like levers and can be used to twist that bar as your robot bounces/drives around. It would be awful to loose a chain because the bar twisted and your sprockets went out of alignment. I believe this is one of the reasons most WCDs use 1 by 2 bar stock.