[Jeremiah Johnson]

In 2005, 648's robot could extend to give it more stability. I don't remember the exact stats but it almost doubled it's short side. How we got it to do this was just lock the back wheel and power the front two wheels and then it would lock into place with servo actuated hooks. When we when back to get into the box all we would have to do was lift the hooks with the servos and squish back together.

This concept made me immediately think of that robot.