The scale in which you model makes no difference, it can be
anything between 1:1 (museum railroads,..) to 1:160 (like Nf) (or
even smaller). We publish a magazine, the Arge-S info four
times a year. This magazine features articles about narrow gauge
railroads all around the world, however the main emphasis is on
Europe and it is written in German!
English Info (PDF-file)