where the jerry cans sin in the trailer is well back from the ball. even having 6 full jerry's in the front, he'll never have a 150kg ball weight, and i doubt it will get to that even with a box and a spare on the front.
my hilux camper only has a 50kg ball weight with an empty box, i can put 4 full jerry's (added on to the other things i carry) and only add 15kgs to the ball weight, and my box is closer to the ball then the section in deans trailer.
we'll have to do some measuring as we go along dean