This is one I did for a friend. He provided me with the shell he found while hunting turkey. I do want to take a minute and warn you. If you are planning on building one for someone and charge him for it, and plan on shipping it, you may want to reconsider. I have a friend who is a conservation officer, and selling one, and shipping one thru the mail, is violating both state and federal laws. You can however do it, if he brings it to you, and picks it up, and you do it free of charge. Just something to think about. I'd hate to hear of anyone getting into major trouble on this. Anyways, here is one I did. I fit a piece of oak into the shell. Chamfering the sides to fit the inside of the shell. Then make it like any other pot I make, with a few extra sound holes on the top sides to help it out.