<R19>
One or two Controllers per Robot. No more than two (2) VEX V5 Controllers may control a single Robot. No physical or electrical modification of these Controllers is allowed under any circumstances. Attachments which assist the Drive Team Member in holding or manipulating buttons / joysticks on the V5 Controller are permitted, provided that they do not involve direct physical or electrical modification of the Controller itself. No other methods of controlling the Robot (light, sound, etc.) are permissible. Using sensor feedback to augment Driver control (such as motor encoders or the Vision Sensor) is permitted.