My point is the tongue weight without the WD hitch means little. Unless you have enough weight to bend the frame.
If the the tongue weight is 1000# or 1500#. The purpose of the WD hitch is to redistribute some of that weight from the rear truck axle, to the front truck axle and the trailer axles.
If the hitch is set so the truck and trailer sit level, and all the axle weights are within spec, I am set to go. (Actually I use the yellow sticker max cargo rating, as it is a bit less than the sum of the truck's axle ratings).
If you have enough tongue weigh to bend the frame, you have other issues.