[EricH]

This last season, we built 1-piece bumpers, then put an L-angle along the sides. On the robot, we welded some toggle clamps. Pop the clamps, pull the bumper off, put the other one on, lock the clamps down. Didn't lose a bumper all season (though we did do a rebuild for Champs). I want to say we "borrowed" the idea from Citrus or Poofs or someone up that way.



Another good method is to embed T-nuts in the bumper plywood, on the noodle side. (Glue 'em in thoroughly, though--you do NOT want them coming out!) Then all you need is long enough bolts, strategically placed for easy access.