I take it back about the 3 inches on either side, its about 1 inch, usually rubbing along one side, I just came back frmo doing it a few more times.
Well in all the time I've pulled trains I've never had to back up either, and yep too busy to practice. No choice now.
Felt pretty good, found out a few days ago a Chambers guy went round and round about 10 times, couldn't get it and finally got someone else to do it for him.
I only looped once and that was on my first attempt.