I've found one VERY important "point" about this method.....I don't think it works if you put your blocks on point! I have all my blocks sewn with the sashing, went to put them together and CANNOT get it to go together around the edges without having one or two blocks not "fit" correctly. I'm bent and bound I'm going to do this, so I'm working around it and going to "McGiver" it at the end, but be warned.
Watson
PS...maybe it would work if you didn't have cornerstones...I'm not sure.