Dave,
Here's a tutorial that Eric Siegel did on the turntable.
https://www.youtube.com/watch?v=-fhKOh1Fva8
I think that your approach will work. The design (arc width) of the RH stalls will determine the actual whisker spacing and the distance from the TT center. You can insert a section curve track at the start of the whisker to alter the distance between the RH and TT edge.
Jan