I have been modelling since 1959 4mm scale on 16.5 mm track . In those days it was only Triang & Hornby Dublo.. All progressed very slowly until 1976 when it was 'all go". I now have quite a large layout based on just about every period from Pre-grouping to green diesels . My preference is 1946 LMS West coast mainline ( I lived 10 miles south of Rugbyat that time). But basing my collection of stock to suit the nostalgia of my "spotting " days I often run anything from A4 s to Cardean and Castles to Bullieds. I hope to be able to participate on your Message Board . Tony O.