I think I have about $700 in mine. The way it works is that a separate cable is connected to a servo motor and pulls the opposite way of the throttle cable and adjusts the speed accordingly. When a rider falls and you slow the boat down the perfect pass cable becomes "loose" and the throttle cable is in control again. Then at some point the servo takes the slack out of it again and when you throttle up and you get near your speed it takes over again.