Fascinating!
I always looked to LaRoca's BASRA as the best indication of what a Trane quartet with Kuhn might have sounded like. This weirdly fussy (but not unenjoyable... Kuhn's chops are underappreciated, I think, and, when he goes, out, he doesn't really sound like anybody else... I think it's the shapes he makes...) take on "Impressions" argues for some reconsideration.