Well if you really work on the OOB again let me point to the research I had done years ago regarding the strength of various Prussian unit types:
viewtopic.php?f=51&t=15937Essence of it:
- Grenadier bat. too small
Should be theoretical 775 men strong, of course deserters, sick, etc. have to be applied. Currently the average is about 680, so 100 men short what seems a little too small.
- Fusilier bat. too small
Should be theoretical 680 men strong, of course deserters, sick, etc. have to be applied. Currently the average is about 600, so 80 men short what seems a little too small.
And there were no bat. guns, they left them in the depots for whatever reason.
- Musketier bat. too large
Should be theoretical 804-805 for the first and 798-799 for the second bat. men strong, of course deserters, sick, etc. have to be applied. Currently the average is about 840, adding some depicted Schützen units they would be even above 850 strong that is way to much.
- Artillery should be a burden not a help for the Prussians
I had thought about doing something myself and had considered to use 2 gun units so each bat(Gren. & Musk.) gets an artillery unit. But I assume you find that to cumbersome. In that case I can only beg to use 4 gun units to depict the artillery of a musk. regiment grouped together, and see if the same can be done for the grenadiers, I think some grenadier bat. were often kept paired.
The whole point here is what the French also realized in 1812, battalion guns suck and are a burden when moving the army and not much help when on the battlefield. This isn't the 7 years war anymore, this is a new time with a new way of waging war. There is a reason why the Allies abandoned them, and even Napoleon only added regimental guns meaning one 4 gun battery per regiment. regiments that were even enlarged shortly before the campaign to 6 bat. per regiment of which 5 were fielded. So not even 1 gun per battalion.
So to put it very short, make Grenadier & Fusilier bat. bigger, make Musketier bat. smaller, add batteries not larger then 4 guns to depict bat. guns of Grenadier & Musketier bat..