[DampRobot]

Our team typically doesn't try to make it's robot exactly 120 pounds--it just sometimes ends up that way. However, when the robot it underweight (ie more than a few pounds below 120) we don't go out of our way to add weight.

Remember, although it is true that a heavier robot is harder to push around, a lighter robot has a number of advantages. A lighter robot can accelerate and travel a lot faster, is easier to turn, and is more maneuverable. I've heard that 254 keeps their robot at 90lbs for the extra performance.

Edit: Thats 120, not 1220 lbs. Thanks SuperNerd