By adding three washers to each end of the trainer quick release I’m able to keep the trainer from making contact with the frame on the Jamis Nova. Without these washers the ends of the mounting arms just barely contact the frame, and with the bike moving around while on the trainer I could see it causing a bit of paint flaking and/or damage over time.
I’ve got no interest in riding on the trainer now, but this was a problem that I wanted to resolve long before cold weather arrives, and now it’s done. I’ve also got a trainer tire and appropriately-small tube, so I should be ready to go whenever I decide that riding the trainer sounds fun. I can’t imagine that’ll be any time soon, though.