I fell in love with this design from Kim Brackett's "Scrap Basket Sensations":
I also thought about a 2" border between the outer and second concentric rows, and made up the difference in the length by adding two 2" brown strips between the 2nd/3rd and 6th/7th blocks, which looked good on paper but not in person. I scratched that idea.
Or should I let well enough alone? I would like the quilt to be a little bigger. My picket border would size it up from 64" square to 80" square. It would also be a lot of work, making those 128 pickets plus the corner blocks. I'll have to look at my scraps again and see if I have enough before thinking further