Well, the unmentionable happened. I dropped the bike while stopped. Let myself get distraced with unfamiliar surroundings before getting control at the stop. Got lucky: the only real damage became apparent later - system case came off the lower mount, rubbed up against the rear tire for a few miles or so before I relaized what happened.
Tire melted a hole into the system case, about 4"long by 2" high.
I was thinking about trying a fiberglass repair. It doesn't have to be real pretty, as it's not a visually exposed area.