Thanks chaps - you're all very kind

One problem with the rules that I hadn't anticipated....
It's necessary to know who the NCOs are, which for the British is easy (big chevrons) but for the Germans not so much (in fact barely at all with thin silver braid and tiny brass disks).
I don't want to add identifying markers (such as rocks) to their bases and so need to think through how to resolve it.......
Edit: wife has most of a solution - all the minis have bricks on their bases so for officers/NCOs paint a single brick a 'special' reasonably prominent colour ..... Now to decide on the colour?!?!