The German army used several different field generators, and I needed one to go with my FlaK searchlight scene.
Researching about a representative field generator I learnt that there were a large number of different generators used. I liked one with an enclosed Zundapp engine on a portable sled most for my scene. The building is just more or less to scale - it had to fit onto the standard trailer (which provided me with the rough dimensions).
I quite liked the texture of the Balsa Foam to provide some rusted spots ... this generator has been in use since 1934...
Although the one I based this build on is available commercially, I neither had the time nor money to import one to South Africa.