Dabbler
ersatz engineer
The nicest 'kit' for ELS (that I have seen) is the Rocketronics 'ELS4 Pro V3'. It offers more than threading; conical turning, turning to a shoulder, ball turning, and more. For a description of all it does, the English manual can be downloaded here:
https://www.rocketronics.de/download/zyklo/ELS4_Pro_Manual_EN.pdf
https://www.rocketronics.de/download/zyklo/ELS4_Pro_Manual_EN.pdf