Ahh..OK .... so only the first part of the name is important. Anything called 'head_xxxxxxxxxxxx' will get randomly chosen for the units head, and so on. Body, legs, arms and hands.

Choices will be evenly spread between the number of options given, so if I want a particular 'trait' in a model part...I can 'spoof' it by putting a multiple copy of that version in, and it will increase the chance of any given soldier having that part. Makes sense!!

Now...time to stop theorising, and get DOING