I currently tow my single F12 using the ball mounted on the back above the bumper. I am buying a second ski so I now will be towing around 1800-2000 pounds. QUESTION:Why do I need to buy a hitch? I even spoke with the Hitch House in Sarasota and he could not explain exactly why I should spend 150 bucks on one. Contray to what many people think, the ball is not secured to the bumper. The ball bolts thru the frame of the truck. If it was the bumper that flimsey thing would rip right off. CAN ANYONE EXPLAIN?