Thanks for sharing that photo Tyler. That is the approach, more or less, that I have used, but I hadn't thought of the ring rail detail, which makes it look much more convincing.
On my 3 turn tables done this way, I haven't painted the bottom to represent the dirt gravel and weeds on the bottom of the " pit "yet, that will help the illusion.
the dual gauge turntable on my RR is at eye level, the photo is looking down on it, but in order to get this photo, the camera is touching the ceiling. that level has the least detail so far, you can't really see much on that shelf so I have been lazy.
The crooked Creek turntable (the one with the station in the picture) uses the rails that come on the Atlas turn table. and a gallows structure just stuck on top.
both the others have added decks to improve the illusion. this was tricky, as I had to get a router, and recess the turntables onto the plywood, and add a deck that was just high enough to the rails up to the height of the rails o the approaches.
these will look a lot better once I paint and scenic the bottom of the pit.
I used to use mill scale gallows turntables that used screws for pivots and some home made electrical pick ups they were turned by had, and lined up by eye. ( I used to tell folks they had digital-optical indexing) Those worked fine for me, but other operators had trouble with them, then my eyes got old, and I had trouble with them, and I rebuilt with the Atlas turntables.
the Atlas turntables while scenically challenged due to their flatness are cheap ( a consideration, if you have 3 -I used to have 4). they alter polarity automatically, and the indexing works ok. two of mine are hand crank, I have a motor on the woe in Crooked Creek as the scene is too crowded, and the mechanism, located in the far back of the shelf, under a higher level, would be extremely awkward to hand crank.
Bill Nelson