Dnk - Rather than calculating based on min, max or average, I think I'd try to figure out what the nominal PF is, I mean what is the prevailing PF reading most of the time. It might be dificult to ascertain, but it seems to me that if you correct for that level, then the amount of time of over correction and under correction will be minimized, and the amount of time of 'just right' correction will be maximized.
Radar
