Check out this amazing tank track system my son’s robotics team designed and fabricated on a Glowforge this weekend. Made from 7mm delrin. A lot of design, testing (they cut and built the whole thing in draft board and made some key discoveries and improvements before cutting in Delrin) and labor went into this. Should be more than robust enough to survive the entire season of First Tech Challenge.
They also have a go fund me page here if you’d like to support their efforts.