I am looking for direction from anyone who has made their own gasket for the Moper BOV conversion. I bought a used one and it came with a gasket but its made of cardboard type material the one you'd use in art classes. What should I buy and how would I go about making a gasket? My concern is that I don't want any excess gasket to be around the moon hole or in the circle inside the moon. Or to go anywhere its not suppose to go. Thanks in advance for any tips.