Very nice. I'll try the grid combat later, but as one (VERY!!!) unsatisfied with Forbidden Psalm, I was already trying to translate this onto a map+terrain.
It looks to me that factoring all the base units to 2 inches should port with the "right-ish" feel on a 28-32mm scale (imagining a 2 or 3ft map), specifically movement is 8+AGI and close combat range is 2 inches.
DR modifier for excess distance in ranged attacks would still probably be 1 inch for unit, but just for simplicity. Not that using increments of 2 inches is impossible to calculate...
Thanks for this.