She's out of the shop! First, a roster shot to compare with the photos at the top of this thread of the original and the prototype:
Detail shot showing some of the added detail - deepened cab, injector piping, generator, johnson bar, air tanks, brake cylinders...
And the other side. The characteristic running board steps weren't available anywhere I could find in brass, but I found a seller on Shapeways (3-D printed detail parts) that offers them and other unusual parts. They look great, and were reasonably priced.
SR 186 was bought by the Virginia Blue Ridge Railway as their No. 2, but never relettered. Here it is at the Piney River terminal with VBR #3, a Williams ten-wheeler:
I do these postings to spread ideas and experience, and to encourage others to try bashing their own locos. If you have any questions, feel free to ask!