My daughter got for me at Joann Fabrics, a sand paper board on one side and a felt side on other. It works perfect for keeping my blocks stable so I can write on them. Also, another thing if you need to stabilize your block, a piece of fine sand paper works terrific. It holds the fabric still while you write. I like your idea Fraew, never thought to write on paper and then copy over it for centering purposes, maybe on the rest of mine that I am working on, I could do that.