I ordered a 25cfm yesterday in anticipation of needing more air. I already have a 10cfm that I use for my wsm. I am pretty sure the size of this sucker calls for more air movement to keep the fuel going efficiently. I even contemplated getting 2 fans, as the guru will let you double up with a fan splitter.
My smoker should be delivered tomorrow, and have to wait till next weekend to play with it. Hope it doesn't rain...