At 04:15 PM 4/13/2005, you wrote:

K,
 
    We don't know what will actually happen to a Nylon or Phenolic ball when it hits the asphalt at 60 mph.  Perhaps it would self-destruct - perhaps it would only roll.

        It will self-destruct.

        It lasted only minutes on my friend's BattleBot. This is going considerably slower with much less load.