As AndyP says, Kozo Hiraoka.
If you purchase the books, he has scaling up directions in them – boilers, springs, etc. Note that North America is 4-3/4" gauge, mainly, while the rest of the world is 5" gauge, but making the gauge adjustment will be trivial.
I'm finishing up a Shay locomotive (3-1/2" gauge, the "original", not the "New" Shay) and the instructions and drawings are incredible. Highly recommended, even just for the construction information.
John.