One slab to rule them all
More often than not there is one slab that stands out in terms of taste and tenderness combined, and I get as many good ribs out of that as I can. Usually I go with 8 ribs ni the box, so I end up having to take a couple from another rack. Those go on the bottom level (I stack 4 over 4), so I know at least 4 judges will be getting the ribs from the best rack. If none of the other racks are in the same ballpark, I only hand in six ribs.