Thanks Sprunglin ! I knew you would come through as I know from previous posts that this is your area of expertise !
I'm having a serious rethink though, do I really want 4 24 figure battalions all in off white overcoats ??? Especially as when reading up on the grenadiers at Fuentes de Onoro, there were three battalions of 18 companies of 'reserve grenadiers' draw from all the battalions of 9th corps. Now these included light infantry sooooo... some of them must have been light infantry Carabineer companies, and eyewitness reports said they were wearing 'bearskins' as some british thought they were up against imperial guard ! As you know nly the Gd light cavalry and a horse artillery battery were actually present.
So I'm now considering doing mixed up grenadier companies in the 4 battalions with only some in off white overcoats 'a la campaign' with differnt uniforms mixed together, but I'm not going to mix grenadiers in bearskins with grenadiers in covered shakos, it will offend my eye
Thanks again.