Project Kaiser Update

HOSTILITIES in the Franco-Prussian War began in August 1870, so the 150th anniversary, and thus the start of my Project Kaiser refight using 54mm toy soldiers, is some way off.
I have painted most of the figures I will need, but have not made a start on devising the rules.
Accordingly I spent time yesterday refreshing my memory of how Neil Thomas tackles the subject in Wargaming Nineteenth Century Europe 1815-1878 (Pen & Sword 2012).

Wargaming ... 63 years on one continent

The following table shows the differences in maximum firing ranges and effectiveness of most of the troops:
Unit                                         Range  Dice per Base
French Imperial Artillery         32cm    2 normally but 5 at 0-12cm
French Republican Artillery    48cm    3
French Rifles                          24cm    2
Prussian Artillery                     60cm    4
Prussian Rifles                        16cm    2
So Prussian artillery outranges French artillery and usually has more hitting power; French rifles outrange Prussian rifles but have identical hitting power.
There is an optional rule, but in my view it would not be a very good simulation of the Franco-Prussian War without it, covering command & control: French imperial leadership is rated poor, French republican leadership is rated average, and Prussian leadership is rated good.
What this boils down to is that imperial armies will have an average of three units "in command," republican armies five and Prussian armies seven.
An army typically consists of 10 units. Those "out of command" can only move half their normal distance, and usually only roll half their normal number of dice for firing (but fractions are rounded up).