The issue I have had with Spot lock on my PDV2/I-Pilot is once you drift off, it starts at low speed trying to get you back. Then it speeds up until you get back to the spot. Problem is, sometimes it is going so fast, you overshoot the spot and the motor spins to get you back. This will twist the cables if not watching. Another thing you may want to look into is the switch box CanePole makes which allows you to use either the remote or your foot pedal without disconnecting. Just got mine and it is wonderful!
Give a man a fish and feed him for a day.
Teach a man to fish and he'll sit in a boat and drink beer all day!