wow, nice work! along with the rest I see in your photobucket.
Did you print these yourself?
The SP AC-9, UP 4-12-2 Class 9000, UP 49er, both SF Blue Gooses, UP FEF-1 was Jason Smith's solid cast resin ones, which I still have several more of his to build yet. The GN W1 Electric (designed by Mike), NH EP-5 and E-33's, Little Joes (designed by Mike), and Krauss Maffeis are all Shapeways builds. The Commodore Vanderbilt and Pennsy S1 and S2 are 3D printed by a friend that does Cad Design for a living. Hes also designing other streamlined steamers for chassis we feel the best for conversions. He also has 3D printed some of the unusual UP diesels which I have but haven't built yet. Also he sells his prints.