I've heard of using the pink foam board insulation (1 1/2" x 2' x 8' panels) as a design wall, but how would it work to pin the layers together? I've never made a quilt larger than a baby quilt (except for the "cars" one I did). So, I'm hoping if I get 4 of the panels I could use them on the dining room table, temporarily duck tape them together and use them as a base to pin the back, batting and top together? Any suggestions? How to you do it?