Having created my WSS casualty markers over a month ago (link) for use with Black Powder, etc. I got to use them down the club last night. They really worked well, the only downside was that I hadn't created enough so I had to use some dice as extra markers, this then resulted in the classic mistake of collecting these up with the hit dice. Therefore either have enough markers or use dice of a different colour. Of course I'm now also thinking of adding extra markers for shaken and disorder.