G413       *ROBOTS must be safe. A ROBOT may not pose an undue hazard to a human, an ARENA element, or another ROBOT in the following ways:

R103       *ROBOT weight limit. The ROBOT weight must not exceed 115 lbs. (~52 kg). When determining weight, the basic ROBOT structure and all elements of all additional MECHANISMS that might be used in a single configuration of the ROBOT shall be weighed together (see I103).

R202       *No exposed sharp edges. Protrusions from the ROBOT and exposed surfaces on the ROBOT shall not pose hazards to the ARENA elements (including SCORING ELEMENTS) or people.

R503       *Don’t modify motors (mostly). The integral mechanical and electrical system of any motor must not be modified. Motors, servos, and electric solenoids used on the ROBOT shall not be modified in any way, except as follows: