That pattern looks great....
One thing i'll add....i took a 6 x 3 piece of heavy card stock....punched 3/8" holes around the edge....cut 18-20" lengths of embroidery floss (that's the length i like to work with), "fold" in half, pass the loop through the hole and loop/knotted it by color. It keeps them from tangling and is easy to remove/put back as you need pieces. Just an idea.