How to make the HexaGearPod 2STAR SD 480p

HexaGearPod 2STAR is the follow-up project of 1STAR ( • One Actuator Steerable... , • My Movie 8 SD 480p ). 1STAR and 2STAR have both two rows of gears, but 1STAR with one DC motor is unable to change directions, whereas 2STAR with two DC motors - one for each row - is able to make turns. 2STAR was designed on Fusion 360 and printed with Ender-7. Creating a Sprawl-Tuned Autonomous Robot (STAR, as e.g. in ieeexplore.ieee.org/document/10121761?source=authoralert or: people.eecs.berkeley.edu/~ronf/PAPERS/dzarrouk-sprawl-icra13.pdf or: • Arduino Robot: 3D Prin... ) is the next challenge.