Thank you for your information. However, there is a slight problem with it. The formula works very well in placing the tracks correctly for the center stall and the two end stalls. The problem though is that there isn't enough room for tracks coming from the other 6 stalls that are spaced between the ends and center.
Prototypically, did the tracks curve between the turntables and roundhouses or did they cross one another? (ie: one rail from one track coming out of a stall would cross the track of another stall close to the turntable.)
If the turntable is moved closer to the roundhouse, there isn't a straight run from the stalls to the turnable which won't work.
Do you know of any type of book or literature about roundhouses and turntables? I just don't know what the heck I'm doing and I would really like to do this correctly.
Thanks again for the help and time with this.