Darlene was kind enough to send me pictures of her afghans made with my pattern. She also gave me permission to post them here so the rest of you can see them. As you can see, she added extra points to the second one to make it an eighteen point.
The blue and white one used 9 or 10 oz. of Caron Simply Soft and an H hook and is 36 inches across. The other is Red Heart and an N hook, 17 oz so far and is already 45 inches across. Great job Darlene, and thanks for the yarn usage info.
Also, no pictures yet but Crochet Leah also sent me yarn usage amounts. She used RH Super Saver about 15 oz. for 36 inches across.
Thanks to all who shared the info, I will update the pattern.