At last report, I had started out by pinning all of the squares in the intended configuration onto a spare sheet. Here are a couple up close:
And here are the resulting nine-patch squares:
I am really delighted with how they have turned out. So delighted that I have, in fact, already completed seventeen of them. And the other eighteen have been sewn into three strips of three each and are waiting to be ironed. This has come together so much more quickly than I had anticipated. I do hope that I can keep the momentum going.