Hi Marc,
I'm not actually modelling New Zealand Railways, but do make bits and pieces of locomotives and wagons that have run on NZR (of old) and in industrial operations. This panders more to my model engineering and prototype design interests.
Yes, 'S' scale is most common, using 16.5mm gauge track. 9mm scale is also ideally sized to represent 3' 6" gauge on O gauge track.
3D printing is displacing older modelling techniques - which is becoming popular for post steam era modelling. The ease of rescaling such is seeing more smaller scales making use of HO and N proprietary mechanisms.
The NZ Railway & Loco Society
Home - NZRLS is a large source of prototype information.
The NZ Model Railway Guild
New Zealand Model Railway Guild – Providing a link for New Zealand model railway enthusiasts modelling the New Zealand prototype no longer publishes a printed magazine, but has an excellent archive of past issues.
You're welcome to ask if there is anything you want more information about.
-Brian McK.
