Got mine from Nappa. I believe they trained a bunch of midgets till they got the fastest time and use that. If your shop isn't top of the line computerized and you haven't done it at least 50 times you will not match there time. I have had three shops running at the same time and if the book said 1.5 hours for a job than no mater what happened or how many days it took you can only charge the flat rate. That tell ya why the rates are so high?