There is a good video here done by Bloc Loc:
https://www.youtube.com/watch?v=fx6NIYz6YJ0
I'd love to know if it works as well on a 9 patch. I love the quilt behind the woman!! I found the pattern last week and now I can't remember the name or where I saw it but I decided it looked pretty hard and I would be frustrated with trying to get all the points to come out nice.