[RoboMaster]

Wow, very nifty idea. If you machine it just right, maybe grease the contact points, I can see this being extremely quick and easy. It is more complex than a simple bolt or pin, but it might make a team's robot all that more snazzy. You should find some kind of handle/grasping point you can put on top of it for simple grabbing.

One thing I thought of: if your bumper has two latches/quick releases, you'll need three hands or a helper: two to pull and hold up the latches and one to pull out/place the bumper. Could you make the quick releases latch up so that you don't have to hold them there? How about sawing a notch in the middle bolt, which you can hook on to a lip from that metal tubing.