I plan to follow along with this thread. Sounds like it will be interesting! I was born in Kansas City (still here) so I'm really enjoying reading the history of the KC&G and KCS railroads on your website. I don't know a lot about the real railroads or their history, but since retiring at the end of 2011 I've developed an interest in learning more about the trackage around the KC area.
My interest has been in learning about the tracks that remain here. Such as, who started out with what track, who has it now, what happened causing track to no longer be used, mergers through the years, etc. With all the railroad history here, there's plenty to learn.
Your website has also given me the thought of trying to trace some of these routes on a map (Google Earth or other). The Train Simulator program and routes/maps/terrain you are creating also sounds interesting. I didn't know train simulator programs could do all that? More to learn about while following along here.