When choosing a CAD software to model your robot, make sure you choose something that will be accessible to your entire team. Some schools have classes and licenses for a specific software (like AutoCad or CREO), but there are also accessible free versions available. For this starter kit we chose OnShape, as it is free to use and has a collaborative feature allowing multiple people to work at once.
This model is important as it will be used to machine the HDPE (or whatever other materials you choose) for your shell parts, so you’ll want to keep it as accurate as possible, and include holes and clearances to save you drilling and filing later. Having robust computer models of your robot and keeping them up-to-date with changes can also help you anticipate spacing and layout challenges, as well as weight distribution.