I like that wavy ruler, but don't want to spend that much. I think I will draft my own pattern. Maybe I can do something on the computer and replicate it onto a long sheet of paper.
I did speak with someone at my LQS, who also suggested sewing first and cutting after. Makes more sense to me that way to help prevent distortion.
Thanks for the ideas! :) I won't be able to work on it till the weekend, but will post a picture when I get it done (or close).