Same...I know nothing. I also don't get some of the complaints about ZO...and the concern for a soft feel in the pull. I'm the same level as Karl (15off) and have only been skiing the course a short time, so perhaps I'm niave or just too much of a noobie...but whenI started skiing the course the thought NEVER occurred to me that he pull from the boat would going to help me by being "soft". I thought the whole point of speed control was to get as exact times as possible through each segment - period. The only question about differences in pull related to WHEN (e.g. - early, middle, late) you wanted the boat to apply more throttle to compensate for the skier pull. Am I oversimplifying the matter? I just don't see how a speed control device that slows down when you want it to and speeds up when you want it to (i.e. provides a soft pull) to the advantage of the skier. How is this objective and neutral in a sport so focused on precision?