As much as I enjoyed building this, and am really pleased with the result (I think the candy red steel tubes go really well with the tan tyres and saddle, and the retro modern spec fits together nicely, if I do say so myself), it has occurred to me that I really should have built a 29er hardtail instead. My intention with this was to have a 'ride to the trails' bike that's better for long days in the saddle than my 26" wheeled Orange Five trail centre focussed bike. The Wanga has basically ended up as a somewhat burly hardtail with the same wheel size as the orange. It is less of an energy drain than the orange for XC use, but a 29er would be even better, and cover more bases. the Wanga just isn't different enough from the Orange to justify keeping it.
Long story short, I've got my eye on a 29er and once I've got it (and assuming I get along with it, although I have no reason to think I won't) I intend to sell the Wanga, either as a bike or split it and sell the parts separately.