[Taylor]

Ball wear is a definite concern, especially for shooter bots. Any non-sphericalness (yeah, I just called up Noah Webster and had that put in the dictionary) will distort the ball's path. I've seen quite a few pics and movies around with people using belt sanders etc. to move balls - while I realize these are only mockups, similar methods will be used. So be advised - don't design a robot that is based on perfectly round balls.