What shaft length are you running on your trolling motors? Reason I ask is I am running a MotorGuide with a 52" shaft but I have 9" between the bottom of the head and the mount. I am changing over to what I think is a 45" Minn Kota. The actual difference in the trolling motors from the bottom of the head to the middle of the prop shaft is 4". I think it will work great and get the head down lower. What say you?