OK, I've purchased a Butt from SAMS. The package weighs about 15/16 Lbs. I'm thinking it is in 2 pieces at 8LBs per but hard to tell without opening it. I plan to smoke it this weekend. Crazy question - I've read 1.5 hours per LB can be expected, so if it really is a 16 lb butt will it take 24...