... a retro layout I am building it in code 100 rail Hi John, For retro handbuilt track you should be using code 95 bullhead. I remember helping on a club layout of Bewdley in EM in the early 1970s which used such rail. I don't know where you would get it nowadays. It was listed by the old suppliers -- W&H, ERG, Bonds, Hamblings, etc. Martin. Martin Thanks for that I had no idea that the flatbottom rail in the Peco spiked track was smaller than code100 982_021734_050000000.jpg I was given several of these parts which are in code 100 and will match up with the flexi track I want to use. I wont be using them as they are but the machined stock and switch rails will save me some time. I do have quite a few examples of different types of track building parts, I have noticed that the Peco spiked track kits is a slightly smaller rail and I do have some additional spare lengths of FB& BH rail. I also have quite a few different style of track ...