My apologies for not posting for a while. I've been preparing for my trip to the USA this week. In between packing and sorting out all the very forgettable but vital things that need to be done, I've created the second line brigade uniforms for the Margravate.
A the moment I'm rating the third line brigade as "Provisional." I'm inclined to go with the Shako rules SYW supplementary section and have the Margravate follow the Austrian pattern of having four stands. This would mean a regiment of 24 figures. An option is to increase to four the number of 4-base regiments in each of the two brigades and discard the third brigade.