Where did you get the buildings from? Especially the factory in the middle.
Thunderchicken, sorry for being late ... The factory and all of the background buildings are converted H0/OO-buildings. A friend of mine bought lots of second hand H0-stuff from a shop for very small money, ripped it apart and combined those parts to new buildings. Most H0-buildings are too small for 28 mm, but there are many which look just nice, especially larger factory kits.