I agree with the load distribution hitch putting undue forces on the tongue welds.
Also, I run my 11FK naked...meaning that my potable, grey and black tanks are all empty, I haven't added anything to the camper frame behind the hitch (like additional batteries or propane or job boxes), and I make sure that we keep the trailer loaded WAY below its maximum during towing. All heavy stuff like extra water, tool boxes, extra propane, cooking griddle and gas grill, turkey fryer, spare tire, jet pack, oscillation overthruster, 88mm cannon, etc...stay in the tow vehicle bed (Toyota Tundra).
I also keep my normal tow speed below the speed rating of my tires...i.e., 65MPH with 70MPH rated tires. This reduces the peak acceleration forces of bumps to the wheels, axle and frame. Finally, when traffic allows I go over to the passing lane as it tends to be less torn up from truck traffic.
CM