Thanks, we appreciate it! It's a passive rocker-bogie system, so no pneumatics. We do have mechanical hard stops on the frame to prevent it from rotating too far back.
I took a look back at 610's 2010 robot, and that is very impressive. We actually took a lot of inspiration from our past robots. We had a similar passive rocker-bogie system in both
2010 and 2012. In 2010, I think we just "copied" what the Mars rovers did...
