The B W fifth wheel adaptor is an adaptor that doesn't change the trailer- at all- only the truck unit, from gooseneck to a fifth wheel mechanism. Feel confident in the strength of this unit as it does NOT affect the warrenty of any trailer manufacturer. The capacity of the B&w as a gooseneck is a healthy 30,000 pounds, however the adaptor for the fifthwheel is limited to 18,0000 capacity.
I think the confusion arises from the misconception that the trailers are modified,and this is incorrect. The gooseneck ball is removed from the square receiver in the bed and a fifthwheel mechanism is place in the bed attached in the square receiver. It is a quality unit. I routinely pull tripple axle goosenecks with a 450 JD dozer with my B&W hitch. ( I do have a class A license w/an ag exemtion from CDL) Hope this helps
rick in west texas