Hi, i just picked up my Advance from a 07/05/08 order that is braned new with a manufactured date of 12/07 ? on a factory check sheet inside the hopper w/manual. I can see that it has a updated auger with the number 2 stenciled under the back of the auger. Is there any other updates this stove should have that a newly manufactured one has? As for the slack adjuster, the white nylon slack adjuster wheel that the chain rides on top of does not spin. It would seem to reason that it should rotate with the chain so a grove does not get burnt in. Also I seen on a cleaning video that is not in the book there is a door to clean out pellet fines. how often does this need to be done and where is it? Any help with possible pics would be great thanks.