Nil. But you're a '70s modeller anyway now, right? ![Wink ;)](https://www.therailwire.net/forum/Smileys/classic/wink.gif)
I've started collecting PC/PRR stuff, but the layout under construction is still modern Western proto freelance.....
I dabbled with thoughts of changing to a modern coal or period theme, but it's too much work, I have a lot of concrete ties and frankly
the thin, single track through all this space just looks so good...