Thanks Fred; read your thread. Great info and about what I'm expecting and hoping for...
Zinn shows I should be on 190s to 200s (ish); I did 15minute test ride a khs 747 a few months back with 200s and my right knee had discomfort at the top of the stroke, probably from a bad strain I had some years ago... Anyway yeah they would take some getting use to if my knee wasn't an issue, so I'm thinking 190s might be the most I should do...
Also it's s weird no body posts how to compensate for cadence and gearing for crank length changes, so I'll put something up...