Writing with one last update in case future forum members come across it.

I now have my Dean dialed in and took it out for its first century last weekend. It was glorious. It rode smooth all day, and sections of road that really used to beat me up felt noticeably smoother. I arrived back home feeling fresher than any other century ride in the past. Of course, part of that may be down to the new carbon seatpost and the Rene Herse tires.

The only problem was that the bike was delivered with a BSA BB rather than the T47 noted in the final CAD drawing. That was not a deal breaker for me, although for others it might be. I've simply accepted it and have enjoyed the hell out of my bike in its first 500km.