Got a 10 lbs pork butt in the WSM 18.5 at 4 am this morning. I am using the minion method for the first time thinking it would help me with coal/heat management. I filled the ring to the top hoping that it would last the length of the smoke 10-15 hours. I am going on 6 hours and the coals are all but dead. I just lit another full chimney to add more coals Am i missing something to doing something wrong. I am keeping the temps between 225-240. Thanks for the help