DSIL made my design wall. He built a frame using 2 pieces of insulation board and 1x2 pieces of wood around the outside and in the middle of each piece of insulation board. I attached warm and natural using hot glue. DSiL then attached the whole thing to studs in my sewing room and there is stayed for 15 years. When we moved 3 years ago, we took it down and moved it to my new sewing room. I had to replace the W&N because it got really dirty, but the insulation board was in great shape. I use pins if I am using long strips, but for blocks I don't need anything.