Hey Roger, can I ask you what method you are using to make your calls??? I use an expanding mandrel through a center hole, but what I would do is I would measure the outside diameter of the snuff can lid, and then cut a 'hole' that diameter and the same depth of the lid into the back of my pot call. Then, I would glue it in and finish over top of it. Also, you can measure the diameter of the lid and plan your sound holes around the snuff can lid.