Super O is a LOT less expensive than FasTrack and better looking, building in "O" or "O-27" profile is even more economical and is available in curve radius from 12.37" to 35.88"(O-27) and 14.14" to 60"("O") in sectional track. Going to flex track in GarGraves(which is approximately O-27 profile - since 1940's) with GarGraves and/or Ross switches leaves almost infinite possibilities for layout construction.
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