Updated 7/14/2020:
Thanks Mark, I'm trying.
As the saying goes, "When the map and the terrain differ, believe the terrain." I have put things on paper, thought they were OK and then watched them fail. I like RR-Track and it is a decent planning tool, but you've got to be careful when you consider 3-D aspects (e.g. elevation of hills). That's important in this situation, as the retaining wall behind the passenger siding is where the scenery will slope up to the backdrop. To get a practical and workable slope, you've got to leave a bit more room than you think is necessary. Particularly on Panhandle 1, I recall planning an elevated track and then having to back off because it was impractical. An inch of clearance takes on the appearance (with zooming in / out) of 6". Sometimes, I've convinced myself that an impossible clearance is going to work. 
The newly modified area around the station is particularly tight - close tolerances. That's why I have some track and 18" cars out on the bench work playing with the physical fit of the components. The leftmost track (nearest the backdrop) holds the K-Line 18" streamlined observation car from the Spirit of St. Louis 4-car set. To the right, on the right hand side of the turnout, are two K-Line 18" heavyweight passenger cars (PRR Broadway Limited). These sit on the mainline. The track is roughly in the correct position. The two curved sections of track (O80, O72) flanking the mainline are not part of the layout; they're just laying there. The green styrofoam beyond the passenger cars is part of the hillside and will be extended toward the viewer, exact dimensions TBD.
More when I know it. 
George
