And now, the update:
Well, it has now come in handy, and it works great. The needle is small, has a neat round eye, and the passing thread goes through it like nobody's business. If anything, the only thing that I have to say about it is that it is a sharp, and that when I work with linen I prefer blunts. But at least it is a fine needle that does not hurt my gold thread, it is easy to wield, and I can do fine work with it so it's all good.
I am also happy to report that I finally found my two skeins of Jap gold, and decided to practice with that instead of the real thing. The large, blunt needle, along with the Jap gold, have allowed me to achieve something that looks very close to those knots. I am still working on it, but it seems that the Golden Knots of Insanity shall be eventually mastered by Evil Belphoebe.
Now, if only my embroidery thread had arrived . . .