[Al Skierkiewicz]

Eric is correct. The parts you show cannot be added to the bumper in part because they shift weight that should be judged with the robot to the bumper. As far as the black is concerned, again the answer is correct. At least one bumper must be of the First colors...

<R12>The color of the BUMPERS will be used to identify the ALLIANCE to which the ROBOT has been assigned, red or blue. Therefore, each ROBOT must be able to display red BUMPERS and blue BUMPERS This may be done via either of two acceptable methods:
A.
Each ROBOT may be built with two complete sets of interchangeable BUMPERS, one red and one blue. If this method is chosen, the BUMPERS must be identical except for the color of the covering fabric (see Rule <R07-F>).
B.
The BUMPERS may be constructed with a fabric covering of one color (see Rule <R07-F>), and then covered with a removable fabric shroud of the opposite color when appropriate. The removable cover must completely enclose the BUMPERS and conceal the contrasting fabric. The cover must be constructed solely of fabric and a fastening/restraining system to hold the cover in place. The fastening/restraining system must extend no further than one inch beyond the FRAME PERIMETER (i.e. no further than any other hard parts of the BUMPER - see Rule <R07-N>). Please note that the fastening/restraining system MUST be designed with robust performance in mind. The restraints must hold the removable cover in place during vigorous interactions with other ROBOTS and FIELD elements during the MATCH without allowing the cover to come off.