[Siri]

Yes, we abused it upside down. Our biggest problem wasn't that the disks got damaged, but that sometimes a robot would be limping around with it under their wheel and not get it off. However, I think this might be less of an issue on carpet (we were smashing these things between metal and concrete). Will try to test today.

The disc itself took very well to upside-down abuse. In fact, we ended up laying a board over it and jumping up and down on the rim without any more damage than I mentioned. I think someone also dropped a steel bar on it without issue. These things are pretty impressive.

More tonight: I'll be running it over with an Outback (both directions, if it makes it) and possibly doing some carpet driving and against-wall smashing.