Sorry for the late reply to this post, but I loved Andrew's write-up, and the photos from your son are great too.
Really an excellent outcome and a beautiful bike. Especially given some of the complications you had and the somewhat tricky design. If I was pursuing another small-wheeled bike purchase now I would seriously consider this frame. My Swift has only 2700 kms on it and I no longer need to commute to an office so I can't justify it! Even so, I really love the idea of a belt drive fixed gear front-disc brake Ti Swift build...