The D51 Steam set's tracks are dark grey and I found out the hard way. When I first started searching for all things grey (light) the pictures I was seeing on the Japan Auctions for listings of this set made the track look light grey. I bought up 2 boxed sets and one loose set and was so disappointed when they all arrived to find them darker than I was looking for. Needless to say that I sold off all of them.
It took a long time and many hours keeping up with the Ebay and Japan auctions to amass what I have. Several times I had to buy large bulk listings just to get some bits of track. The rarest of the the light grey tracks are the "A" sloped curves, the 17" sloped straight rail (which you have both now), the half length straight, the quarter length straight and the M/M and F/F adapter straights.
It took a long time and many hours keeping up with the Ebay and Japan auctions to amass what I have. Several times I had to buy large bulk listings just to get some bits of track. The rarest of the the light grey tracks are the "A" sloped curves, the 17" sloped straight rail (which you have both now), the half length straight, the quarter length straight and the M/M and F/F adapter straights.
![[-]](https://www.blueplastictracks.org/images/collapse.png)