Thanks for all the great feedback here. I am going to plough ahead with this. Given the chassis and bogie issues, it wind up as more of a decent representation than completely prototypical - but that doesn't bother me too much. As some has pointed out the 'frosted detail' from shapeways is a much better option. The goldeneye loco was produced with that material and has a much smoother finish as a result.
If anyone has decent pics, I would be grateful. Thanks.