I'm new as well, but so far I don't see much difference between settings on the rear damper. I usually leave mine in the "less open" position thinking I'll get a bit more smoke that way. I've never had any trouble holding temps, but I suppose there might be weather conditions when the open position works better. Interesting you brought it up, because that rear damper was one of the reasons I went with the elite model. It seems to me that design "should" be able to hold side to side temperatures more evenly than a chimney design which pulls the draft to one end. That's nit-picking though, and like the old saying goes, it ain't the arrow, it's the Indian! Happy Smoking!