Tread-bot with the Educational kit

Conversely, the treads with the Educational Edition of the Kit are multiple pieces that are linked together. Thus, you can make tank treads of different lengths. In addition to the hubs and pins seen in the Bill of Materials, you will need almost all of the links in your EV3 kit to make this tread-bot. For each tread assembly, you will need 26 links for a total of 52 links.

Start by flipping your chassis upside down:

You will need to make two of the following submodels. You will need to build one tread assembly for each side of the robot. Insert axles and pins into the 13-mod beams and secure them into place using bushings, as shown in the following screenshot:

Next, attach the chain hubs to the outer axles and the double-bevel gear to the central axles. The gear is about the same size as the hubs, so the treads will be level.

To finish each submodel, add 26-tread links onto each tread assembly:

Now, you can attach the tread assemblies onto the chassis. The...