My first layout used all of the blocks except one and spacers cut from a favorite fabric. My only problem with it is that it is 70" square. It is almost too big for a wallhanging and is an odd shape for a couch quilt. It isn't a usable size for a bed except as a topper over a bedspread. The only bed that is square is a king size and this wouldn't even cover the top of the mattress. It would need at least 20" in borders on each side. I'm not a big fan of square quilts (except as wallhangings). If I added another row of large blocks to the bottom it would be 70" x 84", too short for a single bed, pretty large for a couch throw.
The second layout is symmetrical, 56" x 70" size. It would be a good size for a nap. It leaves me with 6 leftover blocks. I think I am ready to move on and will most likely sew the second layout (not set in stone, but likely). While I watched Downton Abbey I trimmed paper foundations from a Karen Stone pattern. It is shown in flannel and that is what I will use. I am going to cut for 2 flannel quilts at the same time. I'm thinking about a Stack and Slash for the second one.