[Michael Hill]

We had 1" steel angle (hey, heavy bumpers are allowed) around most of our bumper perimeter. We had holes in the front and slots in the back to allow for a 1/4"-20 bolt to pass through. The bolts were put through the middle our bumper mount rail (1x1 aluminum) and a nut was installed on the inside of the aluminum to lock the bolt in place. So there are four 1/4-20 bolts sticking up in the corners. The bumpers were a single piece, so it slipped on over the robot, then we tightened them down with wing nuts. It was a pretty good system, and I think we'll probably end up doing it again. The only issues we had were inconsistency in the fabrication of the bumpers, so one of them fit a bit tighter than the other (but I think that can happen with a lot of bumper designs).