Just installed PP 3 event on my 1994 prostar 190. First time today trying to calibrate it. We dont have magnets on our course so i was using the open water capture mode. We set the speed we wanted captured and the system beeped and did all the right things. When we tested it , it would engage at the right time, but then surge a few mph quicker and stay there. (We did all this with no skiier on). Am i missing something? The RPM signal is set at standard should i change it to inverted?