It's a beautiful quilt. Based on what you indicate is your experience level, this is what I drew. In the star maybe softly outline and at every place you pause or change direction make a loop. This is easier than straight outline since it doesn't need perfect spacing. Loopy lines through the strong diagonals once again don't try for perfectly centered and straight. In the border echo your lines and make them ribbons floating around the stars. Practice on paper and then go for it.
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