Say, can you place all eight diamonds so that the "arms" at
the side-center < > all match up and take another picture?
What I'm thinking is that if you can make the seams match from the side center most points of the diamonds, all the way down except for the final points in the center of the block, you might be able to make a circle or one piece star of the dark pink fabric to cover the uneven center points. Then the outer arms of each large diamond would still be a little bit off but since they are spaced so far apart it probably wouldn't be noticed by anyone but you. What 'cha think?