I chose a VERY light weight interfacing stuff and drew the arches. I purchased a stencil made just for DWR and drew it with a washable pen. I have no trouble FMQ when I have a line to follow. I did SITD on the seam lines of each block first.
The blue triangles at the intersections are not lined up perfectly when you look at it up close. This was from a scrap bag bought at Keepsake quilting when I visited that beautiful shop.