Hello All, hope you can help. I have the WSM 22.5 and I have recently purchased (and used twice) the Auber ATC. Still feeling things through with the ATC so I'll get back here after I've gotten some feedback with the following issue. I am getting nowhere near the 12 - 14 hours of 225 degree cooking time using the minion method and following cooking directions on this site from a single well filled ring on charcoal. I've used Kingsford briquets only, Royal Oak lump only and a mixture of both. No matter what combination, I can maybe get 7 to 8 hours at a reasonably steady temp, which is great for overnight smokes. Can't help but feel that I amusing way too much coal to complete a fifteen hour cook time. Any thoughts?