I made my own rotating mat using a lazy Susan I bought at a Dollar Store and a 6" x 9" cutting mat I bought at JoAnn's with a 50% off coupon. It is smaller than the Boston Revolver, but it is perfect for cutting dogears off HSTs or for cutting with the Marti Michell templates. I used E6000 craft glue. It works great. If I knew how to trim the corners off so that it was round, it would be perfect. Would a utility knife work? Keep in mind that I am the queen of klutzy.