Buffy, I am currently working on one right now. I used a light weight interfacing to stiffen them up. What I found though are they are not uniform in size, 19" is my smallest, so I had to get a template made of plexi-glass, (only cost me 8.00), so that I can see through it to see where the print is, to cut them all uniform, that is where I am at with them. Then I am going to sew altogher, and put a 5" border on it. I have been working on it a little at a time, it will be about a king size quilt I think when it is finished. I have never done this size, so I'm not even sure if my machine can handle it. We shall see. I might have to send it out to be finished. This one my husband asked for, so I would like to get it done for Christmas.
Cathy