Ok. I am planning on cooking to ~9 pound butts, and a brisket overnight late next week in the 2 Star. I have two upper half racks. Would it be best to cook the brisket over the butts, the butts over the brisket, or does it matter? Also, how much longer should I expect the cook to last? I have only done a single butt overnight before. Thanks in advance for any and all advice.