Ran across another interesting post by Ron Gratz on rv.net about WDHs.
Have always wondered why Ford changed their recommendation on adjusting the WDH to "Decrease front end lift by 50%". Previously it had been remove the lift completely, and some WDH manufacturers even had you putting more weight on the front by "distributing the sag".
Ron Gratz post
Another thread:
Got to message #10 - 11