thank You
I done a pretty voluminous Background reserch when I started my railway project
but of course do not know everything
my approach is due to the time and budget limitation - simply make it as generic as possible
so my rolling stock will be quite suitable for Europe (and the isles) from roughly 1880 to 1950 (epoch 1b-2)
also the armored trains will be improvised or of a type suited for as long a period as possible - namely Orlik (1914-1931) and the sarmowo pattern artillery car (1918-1945) with use in almost any theatre (of course not in Africa or SCW)
the difference between north american and european railway will always force you to make a decision, apart from the early years, so with a little easygoing, ACW might work as well (not the standardized armored trains)
but the rolling stoch you shown me so far is really marvellous - I can only hope to reach such standards - will post it in time