Well, even though he'll tell you it's not supposed to be a double sider, Mike Yingling makes a nice Crystal pot over slate that allows access to the small piece of slate in the back. While I don't use it to get tons of volume, it's great for tree talking to the birds and getting some sweet purrs man. If looking for a true double sider, Hardy game calls makes a nice one. My buddy had one and I really took a shine to it.