Rob is right. No worries, I meant "daisy chained". They each get 5V and the correct amount of amps. Same thing with the enable.

Bad news, I introduced noise again, then rolled back to the state I was in when I posted my first message, and now the noise is not going away. Same thing, though much better than it used it be: in the first second of the spindle starting to turn, as well as the last second before it stops, the steppers move a few steps.

I'll order a CSLab 4 axis motion controller today. Can anyone explain the following to me:
- Zapp Automation sells it for 335 Euros (shipping included) => 0 in stock, have to wait 7-10 more days
- CSLab sells it for 311 Euros (shipping included)

So, obviously I'd go for CSLab official's website.. or does anyone have a spare one to sell ?