Lego Technic Smooth Linear Gearbox - 3 Speed + Neutral + PTO

A design for a Lego Technic gearbox that has 3 speeds plus neutral, and a secondary driveshaft (red). The secondary driveshaft can be used to control another piece of equipment such as a winch or crane. The gear changes are smooth, and the teeth don’t jump, grind, or bind at all. As the motion of the gear change is linear and sequential, it can easily be controlled using a Linear Actuator and an M-Motor (as shown in the video), or remote controlled using the Lego Power Functions system. The gear ratios