My M6 has an annoying rattle noise in the rewind knob.
I guess there might be something that needs tightening there.
I have tried to open the plate (I have the clamps), but I seem to miss something...
I have removed:
the rewind knob and the slotted screw underneath
the speed dial
the hot shoe
the screw at the 12 o'clock position in the bayonet
the winding lever
The right side of the plate is still held by something.
There is that very thin ring around the hole in the plate under the winding lever, but I'm not sure it's not a part of the plate, and if it's not, it's really tight. Is that it, or something else??