[QUOTE=amh;5695733]I have never used it, but have a look at this site.
http://www.multi-patch.com/html/fabric_calc.php
Seems to me that you do not conserve any fabric, but maybe you do.
You do conserve fabric to a point. It depends on how wide the quilt is. This method is great for quilts going on a frame.
For being on a frame this works really good because you don't have the seam buildup. I do like doing backings this way.