Personally, I've never re-autotuned an Auber for different temps, and have never had a problem. 9° being the coldest temp I've used one in, with no issues. But, if you are having issues, by all means, do another autotune for the weather!
Blind - one thing I want to mention, from your original post, is turkey size. You said you were smoking a 17 lb bird... That's too big for a smoker. If will stay in the danger zone (40-140) way too long, and could be dangerous to eat. Stick with 14 lbs or less, and you will have nothing to worry about!