I've received a nice little metal lathe from AliExpress a month ago, model WM210V.

Soon I realized that gear table you seen on the left is very incomplete. In fact, with the gears I have I can cut 482 different thread pitches while the table only lists 21.

Here's a little gear calculator I made to run the gear math for everyone having a similar lathe: kachurovskiy.com/gears/

Have fun!