I am wondering how hard it would be to add an axle to my single axle trailer. It is a pontoon trailer and I want it to be able to handle more weight. It currently can take 2850 lbs, my toon weighs 2150, and I want to be sure it is not overloaded when we go camping and have more items then usual on board, grille, bikes, tubes of food and other camping esentials. Anyone ever do this or should I let the local trailer builder do the work. Thank you.