Our team has one that we think can beat this one in speed, and I'm curious if the think tank around here agrees.

Take two hinges, and mount each at the ends of a bumper, so the bumper does not move when the hinge is also mounted to the chassis. Once the hinges are mounted to both, Knock the pins out. Instead of the pin, put a bolt of similar size in, and spot weld a Nut to the bottom side. Removing the bumpers is as simple as hitting two bolts with a power impact tool from the top.


Though I can see this rivet idea being cheaper than ours....