So that is what she calls it, a fireline join. It works with wildfire and spiderwire. I will attempt with Toho One G, Miyuki, Good Thread, and I might have some Nymo in there, and see how they work, but this should be well known instead of a well hidden secret. I cannot do my threads any other way since seeing this and I hope it helps yall as much as it's helped me 😁 https://youtu.be/YnvEIhv-5o8?is=Vjlx4PqKExI-u5o5