That’s the way I put it into the Perth guidebook but come to think of it a bit more deeply it does not seem to be true at the bottom of the scale….maybe V0 is more like 18, V1 is more like 20, V2 is like 22 and then the +21 rule kicks in V3/24, V4/25, V5/26…. ??? Not that any of this really matters, just jabbering….
