I have a Masterbuilt dual fuel smoker. The racks are 12"x 12". I want to smoke a whole packer brisket and keep it in one piece. I looked at a 10 pound one in the store and that was about 15" long. I've seen how a flat shrinks up a good bit when cooking, and I think that if I would start that one over a rib rack or something I would probably be able to lay it out flat diagonally after a bit. Ideally I would like something in the 12-14 pound range. Do you think that one that size would shrink enough to fit on a rack?