Glasgow St Enoch had 12 platforms, a triangular junction, various locomotive release roads, numerous single slips, 3-way points, scissors crossings, access to a loco shed, a turntable etc
I am afraid it was frighteningly complicated - sorry!
See http://www.wbsframe.mste.co.uk/public/Glasgow_PWI.html for a taster - this was a simplification of the earlier version, I believe.