I am glad to know I am not the only one that at some point has had a fantasy railroad built in their head. Mine was std. ga. and included mining, logging, a huge sawmill complex and on and on. It is sort of addicting assuming you have the time on your hands to daydream about each facet of an operation, planning the structures and imagining operations. I am not a modeler, but I could see where this sort of fascination could easily lead to modeling if one had the time. My liesure time however has ended up being largly consumed with 36" gauge repair and operation.