I have made 3 double wedding ring quilts, and once you "get the Hang" of what to do, it goes very easily. The big issue is to make sure you measure and mark accurately, and use lots of pins when you put it together. There are some acrylic templates at JoAnn Fabrics for the pattern, which are durable enought to last for the whole process of cutting out the piecesfor the quilt - I believe they may be by Sharlene Jorganson. Mine had two sets - one for the actual pieced rings, and one for solid color rings.
Good quilting, and post a picture when you get it done.
nanac