I'm working on a DWR using John Flynn's templates and book. It is time consuming but it's working up nicely albeit slowly. The most critical part of piecing any quilt is getting the correct scant 1/4" seam ( really doesn't apply to PP). I had a bit of trouble with my first arc..it was doable but was just a tiny tiny bit off..I called the company and asked how to address this problem..the lady sent me John Flynn's business card that has HIS 1/4" seam mark on the back. Let me tell you it made a world of difference. Oddly enough the seam allowance in the printed templates in the book are NOT the same as the card which is what I originally set my machine to do..probably happened with the printing of the book..not sure but I'm really happy now that I can make the blocks pretty darn close to perfect. I mark everysingle intersection..takes time but I will do it for every single arc and melon. I spent a fortune on the fabric and I am not going to compromise my work.