Swampy, You mentioned finger pinch....I have a 56" Raven, and of course my 2 56" KS's.
I think Jack measures them a little different because my KS's a a bit longer than my Raven.
I've never felt finger pinch on my KS's at my near 29" draw, but I do feel just a bit with my Raven....just a tiny bit. No uncomfortable at all, just a different feel on my fingers at full draw.
As far as the "Guru Grip", don't worry, my buddy Jack has taken good care of me over the years.
He's a fine gentleman!!