Technically...editx2 I don't know Richard Lehman but would expect Rich to give a better definition of 67 other than because Richart had it on one of his charts... I'd ask Richard why not 60 settings instead of 67... Anyway... I'm still waiting to know why 34 settings that so many people use...? I'd like to think I know why the settings on this chart...since it hasn't changed in 4 years...