I just scored some more of this stuff; unlike my previous track of this brand, the curved pieces have plastic ties and the extra metal "supports" are close to the rails, as opposed to towards the outer edges of the ties:
...the wood ties are to the top; the plastic below.
In this same batch came (2) non-flexible 37" pieces of straight track with the "supports" towards the outer ends of the ties...with wood ties.
I think on the one hand I prefer the look of the wood; after all, it has the wood grain (obviously!) By the same token, having those "supports" close to the rails makes them less noticeable...kinda.
The Gargraves website shows the plastic tie track is available only in 3-rail O; S gauge sectional comes with wood ties only.
Does anyone here know why this came about...or even care? 
I'm just curious: my Flyers seem run on either type equally well...
Mark in Oregon
