Heinlein's was sort of what I was working on . . .
...but bigger, quietly orbiting Earth's Lagrange 4 (AKA Leading Equilateral Point L4).
I was using a ridiculous size, being 10K, with an empty 1K hub for docking on and octagonal deck, that is a 1K cylinder, 1K long through the station hub that had eight flat surfaces.
I have the gravities worked out so there would be 0.0077G at the hub, and 1G at the outer level.
Lotsa floors, lotsa room. Shuttle elevators and cross trams. Had a lota fun working it all out.