This was posted on Traction Talk but some here may find it interesting.
Its the photographic record of the building of three 4" scale Fowler BB1 ploughing engines all from solid with no castings used so far, I think they will probably end up with 4 or 5 castings for the whole engine. Use a translator to get the details of the description.
http://www.fowlermodels.nl/
Enjoy Jason