the relationship of bb to bar height is more important than the static ground to bar height. as bb heights have dropped from 15"+ to sub 14", to maintain the same (balanced) foot to bar height, obviously bar heights had to drop. putting a flat bar low fork [HTML_REMOVED] low stack on something like a vp free is gonna be pretty front heavy / sketch when it gets steep [HTML_REMOVED] tech, but the same setup on an m6 might be just spiffy. its all relative. ie - i run a flat bar on my 13.5" bb bike, but a 3/4" riser on my 14.25" bike. anyways… to each his own.
So with a BB of 14.6, I should be looking for approx 1.25 inch rise, which you can then tweak for comfort/feel by shimming the stem appropriately. Guess I should measure my existing bike and check. Interesting though, thanks.
Please let me demonstrate the ride around; really it's no trouble.