I am in the planning stages of building a backwoods clone and I have a few questions. I have been basing my design off of the plans in this thread. backwoods-style-build My main question is I would like to get longer burn times out of it because I work 10 hour days and would like to use it while I am at work and I can't rely on my wife to refill the charcoal basket I currently get well over 20 hours out of a full basket in my UDS and would like to be able to get at least 12 hours or so I was thinking about making the fire box taller and sacrificing the cook chamber height. His design only has a 10 inch tall firebox and I was thinking of 14"-16" witch would give me room for over 20 pounds of kingsford and leave me with 7 racks 4" apart wich is more than enough My next question is about the intake size. I have an iq110 and would be useing it most of the time but I case of a failure I want to be able to rune it naturally. Would a 2" ball valve be big enough or would I need either two of them or a bigger valve.