I feel your pain.
OK, I confess: AWI (along with FIW) struck me as being ideal for 40mm — not a great many units, very little cavalry or artillery. I stand by that. Except. . .
After starting on the project, and re-immersing myself in the history, I found myself saying “aw, jeez, I can’t do Brandywine with these!”
Then I stumbled across big pile of the Old Glory 10mm at a con flea market. So now it’s A Tale of Two Scales.