Advice on opening 5712 V2 PPF caseback?

[paul.co]

Can anyone help? I’m trying to open the caseback of my PPF V2 5712 and I’ve seen that it’s supposed to be a counterclockwise screw but just doesn’t work and I’m afraid to break it.

Already tried rubber ball and silicone press…

Is there a tutorial on how to do this or maybe some more detailed instructions?

Thanks,

 

[domiffm]

It is indeed a screwed on CB. I was able to open it with a rubber ball, ccw turning. With a bit of force though.

Had to open it to silence the micro rotor.

 

[paul.co]

It is indeed a screwed on CB. I was able to open it with a rubber ball, ccw turning. With a bit of force though.

Had to open it to silence the micro rotor.

Thanks! Pretty much the same reason. How’s yours after silencing and what did you use?

 

[domiffm]

No more „scratching“ sound, but you can still hear the ssssssst ssssst from charging the main spring. But much less noise.

I just used a bit of grease I got from Domi long time ago.