[DampRobot]

Cool idea. Although I like the concept, I feel like weight might become a bit of an issue. You have to carry around all that plate and bearings even if you never use them.

Also, do you have any plans for bumpers? These tend to get left out in most drive train designs until the end. You may have trouble supporting the bumper to what the manual requires (I believe every ten inches) with the three bearing blocks in a row.