Add a new branch run by a derelict Wheellord who crushes bots by running them over with giant spiked wheels. There can be scanners at the entrance to make sure no bots with legs, treads, flight or hover units can get in and he could have a secret stash of prototype wheels powered by alien technology to equip his army of Wheelbots. Also a lab where they study hamsters to learn the secrets of living in the wheel world and to work on weaponizing wheel technology.