OK
Just returned from a 40 min hwy test run.
Truck tires @ 60 psi
Trailer tires up to 80 psi
Adjusted the WDH to allow for 1/4 rake nose down on trailer.
Drum roll .................
Boo ya. Cruise at 72 one finger on steering wheel. Flip flop is gone!
Squishy trailer tires appear to be the issue, in looking for the problem i appear to have skipped the smallest detail and had gone straight to all the big issues.
I would post a pic but can’t figure that one out right now.
I want to thank each of you for your input, it helped me out of my tunnel vision.
Sincerely
Wscott