I want to remind everyone that Teen sussed out that C was the focus and did tell us all. But we obstinately refused to listen, LOL.
My border fabric is quite coarse and globular, so I've decided I will not do the stars in the border cornerstones; I just don't think the points will look good with my border fabric. I'll either repeat the nine-patch in the appropriate size, or think of something else.
I'm thinking it will be A in the center square, but not sure about the stars around the center medallion. I haven't even started working with the fabrics, other than cutting.