Best time for fiddling about on your own - the house is quiet and much cooler. Tonight's action was some gentle testing of the revised Combat rules. OK - identified a couple of areas where I'm not quite sure what happens next (or, let us say, there are some choices to be made), and confirmed one rule I wasn't sure of. Good so far.
Tomorrow some more complicated Combats, and try out the new Artillery rules. Baby steps. Take lots of notes. Hot chocolate is a big help. And a little Couperin on the hi-fi does no harm for period feel.