Vic
Modelling the span between the real and the N-sane...
Hi nik. From my experience with RT 7 (I'll up grade some day) the angle of Atlas #6 turnouts is 9.9 degrees. To complete a 90 degree circle you would need to place an 80.1 degree section of flex track on the point end of the turnout. If you're using sectional track, then use 2 full 30 degree sections and create a 20.1 degree section of flex track using the same radius (9.75, 11, etc.). This would represent a section that was cut to fit.
To keep the parallel ladder tracks at about 1.25" separation I place a 1.25" section of track between each turnout.
Hope this helped.