Yes, it does. Now will try and unblock it.
Trying to understand this:
'When I unscrew the compression screw, it seems as if it is free i.e. when I tighten the screw it reaches a point where cannot tighten further. Now, when I loosen from that point, it is free as if not connected to anything."
When it reaches a point where it cannot tighten further would suggest that it has now contacted the contra? When loosened from that point would suggest that it is now disconnected from contra?
The argument against the above reasoning is that if disconnected from contra, it cannot adjust the compression. So, not sure how to eplain this correctly.