Community Status Updates

How is the tow shaft suppose to be used? I lift it until it (wants to stop?) then do I turn it (screw it down a lot?) that seems to tighten it? When I screw it the other way (loose) it comes out and out of the boat. IS there a proper height? when I turn it to tighten is that (making it fatter?) to hold it in place? just wondering proper usage - though we did tube and board already.