Mark, I don't know if this will help, but while watching TV this evening I threw this together using GarGraves O42 curves and Ross O42 switches. I deviated from the O48 curve and used O54 because neither GG nor Ross make O48 curves. My goal was just to show how John's design appears to work using GG/Ross track. I guesstimated the measurements for the bench work and the whole layout obviously needs to be refined using/cutting GG flexible track if you go with this design or something close to it.
