Sam Mustafa is relaxed about figure and ground scales, encouraging players to adapt to the battle in question and the size of their collection and games table. In this case, I have gone for one inch to represent 100 yards and one unit to be a brigade. This scale, is already used in Napoleons Battles, Volley & Bayonet and Grande Armee.
Fortunately, the 3" square units I have been collecting over two decades fit well with Blucher's scale so I didn't face a rebasing challenge. The Frank Chadwick Order of Battle for 1815 also reads across well, although his rules required many more commander figures and skirmisher bases. I'll have to find a use for all my surplus generals!
The main task has been to repaint the rear strip of the unit bases from green to earth brown. This is the third colour change since the project began but Earth brown bases seem to be the least intrusive so far. I also bought a lot of mdf dice cells from Warbases and glued one to the back left corner of every unit. The colour of the dice would show what special attributes each unit had. For example, white would be skirmish only; black skirmish and attached artillery; green for conscripts etc. I also wrote these attributes on the unit labels.