It would probably work, but the biggest problem with tracks is friction. The rubber tracks on my Treadwell droid burn up the amps. You end up with a lot of surface area on the floor and that creates a lot more resistance than with wheels. I have heard the Wall-E guys have similar problems with high current draw. The only way properly combat it would be to gear the motors down until the current draw was manageable. The problem would then getting the right gear ratio in the small space of the foot shell.