For the downloadable frequency charts from Golfworks (https://www.golfworks.com/frequency-flex-range-charts/), why are there 8 divisions per decade for the CPM (horizontal) scale?  This is prone to error IMO.  10 divisions makes more sense.  Then, for length, since more often than not the length will be in a 1/8″ increment, why are there 10 divisions per inch instead of 8?  Finally, is this chart accurate?  I’ve seen at least one other post about accuracy.  I measured a set of clubs (Srixon ZXi4, KBS TGI60 R flex, no grips).  All of my readings using the GM-1017 showed in the A range with the wedges borderline L range, all lined up in a more-or-less vertical line.  These were off-the-rack clubs.  Any guidance?

Thanks!