I just read the whole post, but didn't see the way in and out of the layout. What method are you using to get inside?
I'm building a long-term project that was an HO article in Kalmbach's Building and Structures book. It's NYO&W classic Victorian station that was scratch built entirely in styrene. I scaled it up in the computer and am building it also in styrene. It's 3/4 done, but has been sitting on the shelf while I build the actual layout on which it will be placed.
It's going to be the main train station for the layout. There will also be some smaller "whistle-stop" stations other places on the line, but this one's going to be front and center, and right in everyone's face near the control panel.
Once the railroad running, I'm going to finish this up. There's a large, standing-seamed roof covering a passenger area on both sides, and I'm going to install floors and some interior details. The painting is going to take hours since the Tudor design has different colors on the exposed framing than on the siding that fills the gaps. I also have to glaze all those windows...
Good luck on your design. I'm using 100% Ross track and switches and really like it. It's scale looking, but forgiving.
Wow, nice job on that O&W Station. Kind of harkens back to something from a long, long time ago, but I can't quite remember exactly what. There is a color photo floating around (ahem) of a station built to this design at Burnside, N.Y. It even has a side view closeup of an Y Class mountain tender side looking forward in it as well as the tower in the distance at the L.&H.R. crossing shortly before it's demolition. All the questions about "what color goes where" are answered in there. Oh yeah, I needed another shade of green.