...great but I'm out until pinion start making shorter cranks!
Unfortunately, arthritic knees mean I'm in a similar position, needing160 or 165mm cranks. Mind you, when you're spending £2.5k the cost of shortening cranks isn't a deal-breaker.
Re. Using a fixed hub, I reckon this would be a bad idea, even if pinion allowed it. Anybody fancy getting a finger caught during a crash?