They have bears in Mississippi? Here the saying goes: *Saw repair, $50 an hour. If you help, $100 an hour.* Generally they go into a pile of saws to work on and some tech comes along to work on it at some point. Unless its a one-man shop. If you know the guys in the back, or bring beer (or a bear) along, that may help. Some shops here will not let you in back, no matter what, for insurance (or policy) reasons. Usually a quick re-tune of the carb is done here under warranty on the front counter, but that will not teach you much. With one Mtronic saw already, you may as well get another Mtronic saw and not bother with carb tuning. No reason to.