I think Davey tells the whole story that in one of the turned out a punk episodes he did. They had promo shots done and everything and then the band that Frank was in…didn’t break up. And so Hunter stuck.
I don’t remember him mentioning any practice sessions (something about the band Frank was in finishing up a tour on the east coast after which they were going to break up), it seemed like a lot of it was talking on the phone? Or that’s the impression that I got from the interview.