[GMAdan]

Even though you may not want to use a bumper/outside rail. I would extremely recommend it. My team uses ifi tract. wheels and without proper protection they are easily bent/broken, last thing you want is a smashed wheel out on the field. Besides that i like the concept. Though adding an outside rail would also provide a place to mount the other end of the axle, thus making it stronger and lessing the need for such big bearing blocks.