[Nirvash]

Originally Posted by Unbound

Thanks for the reply. Would you know the exact rule that states that it is legal?

Via R21 F

Originally Posted by R21

F. must attach to the FRAME PERIMETER of the ROBOT with a rigid fastening system to form a tight, robust connection to the main structure/frame (e.g. not attached with hook-and-loop or tie-wraps). The attachment system must be designed to withstand vigorous game play. All removable fasteners (e.g. bolts, locking pins, pip-pins, etc.) will be considered part of the BUMPERS.