With all the talk about bending Tritons I decided to go in to Mitsubishi and buy the shortest mn tow they had. Part no MR936898 still 300kg on the ball and 3 tonne. just sits under the tray a bit. May have to shorten the tray a little. I think it was about 135mm shorter than the MZ350375 one that was on it. Adam at Carlisle Motors was great, let me go out the back pulled them both out for me to measure them up before I made my decision. And the new one below. you can see how far further the old one stuck past the end on the chassis.
And if I wish to go further in all I need to do is push the tongue in another 40mm and redrill for the pin.