... a 15" miniature railway such as: http://www.ravenglass-railway.co.uk Perhaps the same question can be asked in a different way -- are you using G-scale wheels and rails, closing them in to 16.5mm gauge? Or are you using standard H0 wheels and rails? It makes a big difference to the finished appearance of the track, because of the width of the rails and flangeway gaps, and the size of the timbers (ties). In the former case you might produce something like this: gn15_9ft_65.png Is that something like what you are asking for? In the UK and Templot, G-scale is called "No. 3 Gauge" and you can find it in Templot in the standard list: 2.5" track gauge, 13.5mm/ft (1 :22.58) scale. It's exactly half of the model engineer's No. 5 Gauge (5 inch track gauge): gauge3.png After which you can change the track gauge, timber (tie) sizes etc., to whatever the Gn15 variant needs. The shortest ...