I'm the proud owner of a new AQ and I have a couple questions about set up. First, it strikes me that the distance between the woodbox and the heating element has everything to do with the "burn time" of the wood. So, just how close is close? Touching?, 1/4"?, 1/2"? Second, the operator's manual says that "the back of the wood box must touch the back wall of the smoker". This new smoker has the new style wood box with the top shield permantly attached to the back of the smoker. On this unit at least, the wood box will not quite slide all the way to the back unless I make some alterations / adjustments to it. Do I have a faulty wood box or is the manual out of date?