Behold... the greatest EV3 replica of an official NXT set model is here-in the form of a humanoid! (No offense, DaveAndJoe, the builder of The EV3 Biped Omega Rex.) ALPHA R3X is an EV3 replica of Alpha Rex, the leader of LEGO MINDSTORMS NXT 1.0. ALPHA R3X is nearly identical to Alpha Rex (except that ALPHA R3X is obviously EV3, not NXT). The walking mechanism is very similar to Alpha Rex 1.0's, and the arm-swaying mechanism also closely resembles that of Alpha Rex 1.0. The head does not turn by motor, but it can be moved around manually. To read more of the great details of ALPHA R3X, please continue reading Additional Information. THIS IS MADE WITH ONLY ONE 31313 EV3 SET.