There are a few "housekeeping" procedures at the start of every day's trip.
#1 Accelerate while manually actuating the brakes enough to feel them engage to clean the nightly (or long term) surface rust and to dry them out from possible dew. A few seconds should do.
#2. Adjust your controller per manufacturers recommendations.
#3 . Fine tune to suit your towing tastes.
I have a P2 as well. You should have three "boost" levels, Those are independent of your gain setting. The boost is the initial "power" curve applied to the brakes. I have found that the higher the speed conditions, the higher the boost setting.
Again, just as others have mentioned, you should be finding yourself adjusting your controller several times as temperatures, surface conditions, speed conditions, and loads change.