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.
“It's time for me to do things I like so I will be happy, my wife will be happy, my friends will be happy. I just want to do something I'm proud of. It's time for me to change. I could sign with a company for 10 movies and I'm the king of video and so what?”
“The Moon and Mars were the two most likely candidates for life in the solar system; what exists beyond our solar system is mere guesswork.”