Ideas Are Everywhere

I'm not sure what a "runner" is, but your 3x12 layout reminded me of some things in these two German sites.

These are track plans from several towns in Germany.  I like these because they include key buildings and the signals (which I don't understand).

http://www.mittenwaldbahn.de/glplan.htm

You will have to dig through this site, but there are several really nice color drawings that you might find interesting.

http://lokalbahn-reminiszenzen.de/start.htm

Chaz