I have a Yukon 750 2020 and I prefer fewer PA levels than the default 9 levels. I've scanned through the advanced settings and I see that PA 0-9 is the default and that my using the - button I can change the PA levels........say to 5. After having done this, the highest PA level now being 5, is PA 5 the equivalent of PA 9 or is it 5/9?