People that make comments like that about SF2 usually have no experience with it. I always park the tractor with it centered on the line at night. That way when I come back in the morning all I have to do is press the "center" button and ROLL. I've never seen it more than 6" off at the maximum and 95% of the time it's within 1-2".

http://talk.newagtalk.com/forums/thread-view.asp?tid=23724&mid=162780#M162780