I have a P3 and have no problems switching from one trailer to another and not having to reset it. Mine sets about 10* up. I go from 3,000 lbs to 11,000 lbs on the same setting, I did crank it up some for the 18,000 lb trailer last spring. I also switch the unit between trucks with no issues. JMHO.
Same here I have been using mine 2 yrs no problems.
You just have to fine tune it.
