I was unwise enough to actually mention this in public a few times, and in fact to point out that there were two versions of the book now. One of them had somebody else's name on the cover, one had my name on the cover. ↗
You make sure that there's a structure that's interesting for them to play on top of, then do temp versions and try it on the film. By the time the players come to the recording session, I've found what works. So I'm not wasting their time. ↗