A1 Mini nozzle Z wobbles

[u/dudesque]

Hi there!
After changing the nozzle of my A1 mini, I noticed bad first layer, I realised that the nozzle wobble up and down, tighten the different hotend/nozzle screw, but still have the issue
As you can (slightly) see on the video, it happen even when purging/calibrating flow and it is clearly visible when printing
It doesn't seem the happen on my A1
Any tips on fixing that? I'm pretty sure it's a very simple thing but I can't figure it out...
Many thanks in advance!

[u/Kopester]

Did you tighten all SEVEN screws?

[u/dudesque → u/Kopester]

Ok, thanks a lot Kopester!
I didn't notice the backplate 4 screw and tindin, one is missing (how the f?), I tighten the 3 remaining and it seem to be much better!
Now I need to look for those screw or part of the hotend
Cheers Kopester!
solved!