Had my first experience recently with my boat bouncing of of the hitch. I tow a 18' Bayliner with a Toyota 4Runner. I hit a rather deep pothole at a slow speed (probably less than 5 mph) and the thing popped right off! I was going this slow because I knew the hole was there and knew how to "avoid" it. I do a really thorough check before leaving to make sure everything was secure, including bouncing the trailer to make sure the coupler was tight. After getting the boat back on, I went ahead and tightened the coupler bolt a few more turns just to be sure. Now the latch on the coupler requires a little more pressure to snap shut. My question is how tight should this be? Can it be over tightened? And should the torque on this be checked each trip? Any feedback is appreciated. Thanks