2 sets of bumpers legal?

[ChuckDickerson]

Our team colors have always been red and blue. This year we built 2 complete sets of bumpers for our robot. One red set and one blue set. We would like to be able to swap out the bumpers from match to match depending on if we are on the red alliance or blue alliance simply to match the alliance color (and the color of the trailer we are attached to). I am wondering if other teams have done this in the past and if it is legal. How would multiple sets of bumpers be viewed in the rules and during inspection? Would they be like batteries that you are allowed to swap in and out as desired or would they be considered alternate configurations of the robot? Is one set a spare or do both sets have to be weighed in at the same time and be less than 18lbs collectively? I have read the rules and can see it being called either way. Bumpers like batteries are not part of the robot weight and so I wouldn’t think they would be considered an alternate configuration, however, bumpers have their own weight restrictions and batteries do not. Our two sets of batteries will not make the 18lb limit collectively but each individual set do, of course. What rules would govern this situation?