I am sorry that I don't have the answer to your question. But I will be following this thread closely as I am wanting to do a DWR quilt also. I recently ordered the templates to do one. Have been wondering how difficult this is going to be and if I am going to be sorry that I have attempted it. And I also wondered about fabric needed to do it. I am planning on using 2-1/2" strips to cut my pieces for the arcs and using fabrics already on hand. But I will need to buy the background fabrics. I have considered doing paper piecing, as Judy Niemeyer pattern, but thought I would try it without doing that. Please let us know about your progress.