You could very easily convert these Guard Marines into the Black Brunswickers who fought in the Penninsular War and Waterloo, as they also wore a braided "dolman" jacket like this, and would be a popular figure as to my knowledge, no one has made these files for 3d printing yet. The same shape and size shako could be used, but stripped of all the cords, and with the drooping horsehair plume and skull and crossbones for the Life Guard Battalion at Waterloo (and Peninsular War Regiment), and conical pom poms and cap plates for the Line and light infantry battalions at Waterloo. The would have the same cross belts, though only for the bayonet and now small sword, plus a haversack and British round canteen. Pack with blanket would be smooth as painted/tarred canvas, and not fur like French packs. You could make all of the units with just interchangeable heads. Here is my Brunswick reenactment group at a Waterloo anniversary battle reenactment!