[apalrd]

469.

To elaborate on that robot (in case you want more than their number):

8wd with pneumatic tires - 3-speed servo shifted Dewalt (4 CIM). Front and back pairs pneumatically lifted. You don't push them, they push you.

Unfolding mechanism - You have seen it already. What you probably didn't see is that they latch into the tunnel from the bottom, so once they unfold, they are locked in.

Ball control - 3-roller collector (top driven 2xFP, free-spinning bottom and back), full width (sticks out in front of front wheels)
They also have a good kicker. This means that on the rare occasion that you get to the tunnel before they do, and manages to not let 469 push you out, that they can still play a "normal" game, even if they can't change zones. They are good at it, too. If their partners are incapable, they can play a mid-zone game then get back in the tunnel.

You can't tip them. They will right themselves if they fall over backwards, even if they are pushed all the way down (to the point that their mechanism touches the ground).