Classical musicians do this all the time. They want perfection. So they piece things together. Eight bars of this and six bars of that. Glenn Gould said that with a recording he wanted to make perfect versions of pieces.
“Look, I don't have a Facebook page because I have little interest in hearing myself talk about myself any further than I already do in interviews or putting any more about myself online than there already is. But if I wasn't in this position, I'm sure I would use it every day.”
“I'm going to keep making films I believe in. Whether I am successful or not is besides the point.”