Flashforge Creator Dual / Pro How to fix Dual Extruders dragging across prints.

[Detzi88]

Hello there,
after i read all post i now really wondering.
I got my FFCP a month ago and now have to calibrate my nozzels becaus on is off by 1mm. As the pictures from
SL666 in Post #6 tell me, i suggest having the same setup.

But if i remove all the stuff around the aluminum bar and losen and remove the setscrews (lil black ones) my throats wont come lose.
It's not that i didn't tried. First gentle twisting and pushing/pulling with my wrench and fingers later going on somewhat rougher but even holding on to the aluminum bar with pliers and turning the damn thing with the wrench i didn't came out nor in. The only thing it does is twisting and that requires an amount of force that can hardly be well.

So can anyone please tell me what i am missing?
Thanks in advance.