Attempting my first Boston butt cook on the Egg tomorrow;. Several of the sites I've visited indicate that you need to smoke a Boston butt 18-20 hours. Others have said that it depends on the weight; i.e., you should smoke a butt 2 hours for every pound. The butt we bought is only 5 pounds; therefore, I was figuring that 10 hours should do it, according to the second method. Is this correct? If not, I need to get up a whole lot earlier tomorrow A.M. Thanks in advance for your replies.