I made one using the Wendy Mathson Trimplates. I love the method, but I understand the Trimplates are no longer being produced. If you can find a set of them for a reasonable price, I would recommend them. My finished quilt is here:
http://www.quiltingboard.com/persona...s-t209159.html
SAS is my absolute favorite pattern. I can't wait to see yours!
Darren