ANY of the early war Brewster variants needs to be added.
The variant in AH is already as early as it gets. B239s first fired their guns in anger in June '41, Pacific War was still almost half a year away.
Swapping out some weight, engine torque/HP, and some gun options cant be all that time consuming in comparison.
Later variants had more power and weight, not the other way around.
There are no changes in the frame or wings or anything, just the weight, engine, and guns.
Doesn't work quite that easily. Just for an example. There were differences in the length of the fuselage between variants. But as this is a thread about variants,
later variants of the Brewster are certainly within the scope of this thread.