Ron,
Your numbers make sense. However like all things there should be a way to prove your claim. There should be a way to scale the weight at the tongue BEFORE(which there is) and AFTER(which you claim you cannot) the WD system is engaged. You can claim anything on paper. If my experiment with placing a scale directly under the tongue ruins your claim, then can you think of another way to prove yourself with scales or similar? Scales under the axles do not prove your point, as they only prove that weight has been distributed and everyone agrees with that.
