Hi Pete,
Very interest tutorial!
If you use a control track on a digital layout, you have to build it as a circular structure because you cannot reverse direction. This tends to result in a quite large control track because of the largish curved pieces. However, you can add sections of short straight between the curves.
You may need to enlarge the control track, anyway, simply to give extra time for the control train to complete the rotation if such timing is critical.
Or I suppose you could make things even more complicated by adding signals with a delay to your digital control track! Haven’t tried that, yet.
By-the-way, I found that once I had got every automatically conrolled switch or signal working correctly on my digital layout I could edit it to delete its name. This means that only user-controlled items need be displayed on the layout. But I expect you all knew that, anyway.
Cheers,
David