Black Powder: a little more Seven Years War

Played several interesting turns of a solo re-run of our Black Powder game today substituting my Prussians for Stephens just to thrash out a few rule tweaks.
Mainly I was testing a system of forcing Infantry units to dice (a Morale test of sorts) to charge other Infantry in the Open which seems in keeping with our understanding of Seven Years War engagements.
Whilst it means another dice roll it does seem to work ok with higher Moral level types being potentially more aggressive and Militia types corresponding less so.