After looking at some of the finished shawls, I decided to block the edge with a smooth scalloped edge.

Using Rowan Felted Tweed.
Swatch on size 9 gives me 4 sts/inch before blocking in St. St.

Second ball of yarn started about halfway through clue #3.

Third ball of yarn started halfway through clue #4.

I worked the smaller version, and it used exactly three balls of yarn! I still had my swatch to unravel if I needed to, but that wasn’t necessary.