So I have decided to keep going around and around and around and around a few more times. I still plan to learn shell edging for the edge. I still have plenty of wool, so that's not a problem.
I'm not sure what colour I was using when I last posted, but I am currently using purple. I've got another 2 and a bit rounds before I change again.
I've now used 7.6 balls of wool out of a total of 18.