We use Fusion 360 to model up parts in 3D for use on our robot. Key examples are our airplane launcher, our custom game element, our claws, and many other items. Using this same program, we modeled our robot. Over time, we will work on it until we eventually have our whole robot modeled up. Using the model we made in CAD, we designed parts for the robot, including our wheel guards.
Currently, we have three people working with CAD. These three people took on the task of making most of our robot's objects. For instance, we designed a lot of our claw upgrades with some input from our team. The rest of our team is also reasonably knowledgeable in how to use CAD due to a class at our school that teaches the basics of using Fusion. Fusion also allows us to modify other files that other people have made and use them as inspiration to create and change based on the parts we like and think would work well on our robot.