I used the new Victor threads. Although it is listed as Size 40, it felt more like a Size 20 to me. It is not as smooth as other threads I have used but it was a nice alternative.
This pattern is lovely but I am biased towards Josephine knots. Tatted in two rounds using two shuttles. It would look even more delicate in a smaller thread.
Note the Josephine knot in between two rings in the outermost round. Also the mirror image of the 3 rings. I thought those were nice design elements.