I finally completed this job. Planned to do it by the end of May,
but thanks to COVID19, I stayed 2 months longer on board and
arrived home one month ago.
As you can see from the video, it works. And it works flawlessly.
I believe that all details except automatic threading stop can
be seen and understood from the video clip.
Automatic stop for longitudinal feed works perfect when turning to a shoulder.
Repeatability / accuracy 0.05mm (0.002").
Automatic stop for threading will be described in another post / video.