Now I realize that I should have applied the small stars before sewing the large ones together. I have spent the morning ripping back the corners, figuring out exactly where to place the red triangles and then sewing the corner back together. With all those bias seams, I have found spray starch to be my best friend. So many corners.
I also noticed a bit of a problem with the negative spaces but with a bit of help from Marcel, was able to get them looking balanced. Note to self: Think more about negative spaces on the design board. Don't wait till they are sewn together.
Still thinking about the blue border. I may want some small stars there too. Will I make them set into blue backgrounds the way I did with the yellow, or will I machine appplique with yellow or gold satin stitch??

There, one more corner done.