I am in process of returning an Ericson 29 to usable condition. I installed an Indigo 3 blade propeller which really improved my cruising speed but made the helm so sensitive that if the helm is not moved cautiously it will nearly spin out the boat, not a comfortable thought when cruising on the ICW in Mosquito Lagoon, Fl as the channel gets very narrow there and I wonder if the 3 blade prop is washing the rudder as it is very close to the rudder where it exits the hull?