During the Columbus event, we noticed that a chain had broken inside one of the rails of our drivetrain. We used some of our unbag time to figure out what exactly happened, and the damage was far greater than any of us expected (sprockets had all of their teeth sheared off). Although the exact cause of the damage is uncertain, we are sure that the extra load on the drivetrain due to the field carpet not being on a solid surface had something to do with it. I'm interested to see if any other teams at the event had similar issues.
Pictures:
http://imgur.com/a/SBt8m