I got this used trailer from a person that had a 14' flat bottom jon on it. My boat is 12' long,so I put the boat on the trailer and left about 2 to 3 inches of the bunks extended past the back of the boat. I then moved the winch crank up two feet to meet the bow. Now everything sits and looks great except I have 55" from the ball coupling to the bow of the boat. is this going to cause a problem, with all the weight at the back of the boat? I hear you should have about 10% of the boat on the ball? It doesnt take much of me pushing down on the back of the boat fully loaded to lift the the tongue? my boat is a jonboat too.