I went round and round on this myself. I settled on the 52″ for my 2008 Cougar and am really happy with it! I am glad I chose the longer shaft. It does prevent the rod box from opening all the way when stowed, but it is still easy to get rods in and out. It opens about 80%. There is also some interference with the bow light. I have to pull it before lowering the motor and reinstall when stowed. Im looking at installing the LED bow light from the BCB store.