Drake looks interesting. As for tool post grinders and such, there's no way to control the size with sufficient accuracy on something as crude as a manual lathe. I don't know if anybody puts such on CNC machines, but you need micron resolution for these small threads. You also have to adapt for the helix angle using a wedge or something. At the size in question, support is a huge issue. I've cut them successfully in softer materials, but need to grind much harder materials now. I'm also thinking a tap and tool grinder like a Rollomatic might be ideal, but the cost is out of sight. Not something you'd find in a job shop either. Question- do people put live tooling like grinding wheels on Swiss machines? That would seem to solve a lot of the support issues.