Hi Edward
Are you planning to use Piquet Cartouche(2nd Edition) as one of your rules ?
I wrote that supplement and have a lot of experience of Piquet so hope you like it.
I really like card based wargame rules but I think you will find Marice and Piquet have very different engines under the hood.
Piquet action tends to be decisive, particualry in melee, where as in Maurice, based on my single game, is more attritional in game play.
Maurice card approch is perhaps more subltle than Piquet as a single card can be played in a number if different ways.
I think both sets are good for the SYW and I am really looking forward to getting the full copy of Maurice.
Mark