for those interested, below 3 youtube video to show how i've transformed a PROXXON classic mill into Micro CNC Mill.

part 1
https://www.youtube.com/watch?v=z0pUitNqXCA 2

part 2
https://www.youtube.com/watch?v=HrA3mbXWlAE&t=50s

part 3: metal milling test
https://www.youtube.com/watch?v=dyquyG3OtWU