This is strange. It has been
established already that, according to the rules, if the robot is still touching it is not hanging. Furthermore, even if that part wasn't in the rules, one could deduce whether the robot was hanging or not with a little common sense:
1) The tread is still part of the robot, being partially
attached, and all.
2) The tread is supporting its own weight.
The fact that the tread doesn't weigh very much does not preclude the fact that part of the robot is supported by the ground. Sure it's unfortunate that they couldn't hang, but that doesn't warrant them getting 50 points. For those of you that say you could remove the tread to see if the robot would hang, I implore you to read
this again and think about it.