"Waterskiing, A Waterski International Guide", (Jack Travers, Fernhurst Books Publishing, 1990, Page 46-47)
One reference - Another exercise to work on during the early part of the year is two-hand skiing at 14.25 m (28 off) at 4 mph (6km/h) below your maximum speed.
Ever since the introduction of the foil, the biggest mistake skiers make is under-pulling. This method of short-line slalom skiing at slower speeds forces you to pull long to reach the buoy yet, because of the speed, reaching the buoy is not impossible.