There is no longer 'generalized' HOW2's, nor any one size fits all these days
The OEMs have different suspension, frames, etc, etc that makes a one size fits
all impossible
The old school of 'even drop' of the TV is gone, though I still do that with my
Suburban. As it was before the massive changes to the various OEM suspensions
Best to follow 'your' OEM manual and not necessarily advice from these types of
forums. Unless the advisor has the exact same year, model and optioned as yours.
Even then...I say follow your own manual
There are some generalizations that still apply though...
Like slightly nose down for the trailer. That continues to be universal...though
when I first got here...arguable by many
WD Hitch Head Tilt...it is to gain both more travel during tensioning the bars
(no matter trunnion or round, etc)...and more travel during driving