Well,there's a small problem in using the TXT-1 as a robot. Good steering(zero turning radius) is possible using the "skid steer" or the "differential steer" method,which is unlike the TXT-1.This makes control a bit difficult when the robot is autonomous.

The TXT- 1 is capable of 4 wheel steering(4WS),but still has a turning radius.I've still to try it out.