Years ago we altered a set of rules from 20:1 to 50:1. So a 30 figure Btn became a 12 figure Btn.
A 6" move became 6cm.
Figures firing 12, when 20 men were killed 1 figure was removed.
If you counted each figure as 2.5 figures.
and removed 1 figure for every 50 men killed the end result would be the same in figures removed.
Mike