Hi Mark,
I had to go check out the HO Scale stuff as a result of reading this. Bad enough that I have a ton of N Scale that I need to get set up in my new digs, but if I am going to have a display set up, it will have to be HO. The N Scale will be for operational use.
Nice work in such a small size.
Now to figure out how to work up these flat-box-hopper-loco-caboose thingees into a 3 D project.