I can't think of a track diagram location off the top of my head but you may find the Railways of Scotland DVDs veryuseful for prototypical information. The Edinburgh to Aberdeen one shows some good footage of Leuchars, Guardbridge and St A's at this time. The Fife one concentrates more on Thornton junctions and south Fife.
I found this
and this
But you would probably want something more localised.
I found this

and this

But you would probably want something more localised.