Well, things have been changing. Shapeways has changed their pricing structure on the Frosted Ultra Detail, Frosted Extreme Detail and cast metal parts. The good news:
Many of my designs became cheaper!
The bad news:
Some of my multipart designs, such as the sets of 2 and 4 FC-150 trucks - did not see as much benefit, and a few designs became unprintable. So, I am at work revising a few models. I have taken down all the offending parts currently, but I will be getting those back up as soon as I can. In addition, the track roller gauges will be going up.
The walls project hit a bit of a roadblock, and I am once again reworking the models. However, the Gilpin cars came out very well. They do need minor modifications now that I have my hands on them, but they too will be coming soon in HOn2. Other versions - HOn30, Nn3, Zn2, maybe even On30, On2, Sn2, and N may also be coming.
Next major project - a locomotive for the cars!