I've used a method I read about some time ago. The author sent me a diagram explaining it that I can't find.
You start the process by wrapping the metallic thread over the rod and your finger at the same time. I'm right handed so I wrap around my left pointer finger and the blank holding the standing part tight with my left thumb. Take as many turns as you want, trim the standing part and tag end down to a couple of inches, and push each through the space between your finger and blank, remove your finger and pull both ends tight. The wraps comes out lined up without overlapping, trim both ends flush.

I've used the method many times....works great.