Tube notcher from piston pin - video

Tube notcher from piston pin. By Hands on Table. 12:29 video:

https://www.youtube.com/watch?v=eNucSgUdQp4

Good work!But it is only for one diameter of the tube and it makes sence of making it only if you"re often work with a certain diameters.Once i"ve seen a device of the big hand drill that used a "crown heads"and transverse feed of the lathe.And it was easy to change a tool for another diameter.