Very interesting, I like that they will accommodate 28mm on a 6' x 4'.
A D20 for combat is also interesting, I am always unsure about D10 or D20 combat due to the wild swings of dice, put perhaps here the number of modifiers add a fair bit of influence, something to check out anyway.
I am also interested in the 6" range for smoothbore musket when set against potential movement rates, so again, see how that pans out.
I note that artillery with 4+ markers can't move, other than by manhandling,
does that mean that in relation to the 5 markers plus causing automatic retirement, that that movement is just made at the man handling rate?
I like the look of what is going on, so will give these a spin, thanks for posting them.