What size bars do you have on the wd? IMO they should be 1000lbs bars...
Use this calculator. Its so much easier..
http://www.towingplanner.com/ActualWeights/TravelTrailerCatScales/?w1sa=3120&w1da=3800&w1ta=6000&w2sa=3060&w2da=3920&w2ta=5960&w3sa=3280&w3da=2920&a=2It shows you have 780 lb tongue at 11.6%
It would be nice to see after your adjustment what you get for tongue and %....
I tow with a 10% percentage. I restored the front axle to stock height with the WD... to the lb dead on..
This is the WD instructions I believe....
http://manuals.adventurerv.net/Eaz-Lift-Weight-Distribution-Hitch-Elite-Instructions.pdf
