I've also written a set myself. It is loosely based on the old WRG 6th edition rules. I got fed up with all the book-keeping and complex charts in these, so I did a bit of maths and produced a set with whole-figure casualty removal using only 6 sided dice which has much the same casualty rates. Then I changed the move sequence to make it semi-simultaneous, and ..... I don't know why I'm telling you all this. If you are interested, have a look. They are fun. – designer's website