Steve,
Many thanks for the Porter site. What a variety - should justify almost any kit-bashing project.
Juergen,
I think the turntables date from the preservation era. Before that the locos ran backwards when necessary - so 50% of their workingf life. The original Porters (like Rusty/Casey) do not seem to have survived, and in those days I believe they only had one of the more modern saddle tanks. From memory, the original rolling stock comprised a couple of semi-open tramcar style coaches, a couple of open-doored boxcars (home-built) for bark traffic and possibly a flat car.