I'd love to say "i'll build your wheels!" being only down the road in crouch end - but I'm kinda new to it and don't think I could offer such a great service as the fella you've found. Maybe go for a ride sometime when it's finished.

++Off+topic++
Just got the trike back home this evening after a 6-hours-to-go-120-miles-because-of-fog-and-traffic-trip to kent and it's definitely all 451'd up. I think I'll need a new rim for one wheel at the back so I may swap out the ok front one to the rear so they match and get a new one up front. And now I can with all these excellent links. Up until a couple of days ago I'd kinda given up on sourcing 451s ($%!s) in the UK. My forks also came today so will be looking at getting the twenty some bigger skinnier boots in the spring. Yay!