Thank you Michael, I were not able to fully understand all these explanations, thats
why I hoped to find a video. One of the very best video tutorials covering MOIs tools
are those of Stefan. https://www.youtube.com/user/Schnellerstef/videos
Unfortunately the only tools he did not cover : the C-lines ;-)

I have many videos about that...but in French :) (very visual)

Pilou this is very good, I will try without french !