Thanks everyone for your input. I cant afford a modern 5th wheel and have been looking at older ones, which of course weigh more. I'll probably skip it, since buying a truck is out of the question and look at a bumper pull trailers again. Im not worried about the axle, since I have a lifetime drive line warranty. What I dont understand is how is the load on the axle any different weather its centered over it or a couple feet behind it?? In my thoughts the only thing that changes is the load isnt pushing straight down on top of the axle rather back and at an angle... Either way I think is the same forces on the bearings and I honestly would think the tugging of a trailer behind the truck would be much worse.