I needed to make a left-handed threaded screw for my watch that I'm making. I could only find an appropriate tap. So I went through a experimental process of making a lot of mistakes to produce a die that works.
Here is the screw making process;
[youtube]https://youtu.be/kQhDABFjmRg[/youtube]
Here is the die making process;
[youtube]https://youtu.be/SEdmDtGUv7U[/youtube]
I hope you enjoy, if you have any questions or advice I'm all ears