Well done on progress. I've recently sold my NeilPryde Nazare on the grounds it was a small when I ride a medium. I'd agree about the stiffness and numb fingers. But then it was almost a copy of the Cervelo S3 and very race-oriented. I'd still have another though ...Not really! As said before, I didn't buy it with any expectation that it'd increase my average. I was a bit nervous it'd be a punishing ride given everything I'd read about its stiffness and aggressive setup. It's actually a fair bit more comfortable than my Neil Pryde which is really surprising. When I hit bumps and bad surfaces on the Neil Pryde you really feel the hit, the shake, a bang, almost like a shockwave which travels through the bike and isn't absorbed, and instead travels through you. The chain slaps with the impact and it's generally unpleasant. Perhaps my tyre pressures haven't helped and I've often come away feeling fatigued, with numb/ringning hands and fingers. I can only put it down to the bike as I know the fit is spot on.
Picking this up a bit late, but I've got the 50mm version of the same wheel - really happy with them so far and the profile fits a 28mm tire perfectly. What made you go for the shallower depth wheel? I'd have thought the deeper wheel would have been a better option for an Ironman.