I used 3 EQ blocks.
10 Sashing > Cornerstone and Strip Pairs:
Stripe-4  and   Economy Patch
10 Sashing > SawtoothTriangles:                                  Sawtooth-1 (half triangle blks)
The Economy blks are in the sashing which is the same size as the other center blocks.  This did not really accomplish anything, so I might as well made the center a 9-patch blk. Because of the Stripe-4 blks in the borders, I had to make some borders without top and bottom strips inorder to get my design. I like the white star which emerged by surprise
in the center.