I have a GSN and sometimes i think the thing is playing with me, trying to mess up my mind and drive me crazy. You story has brought a smile to my face Juan and i hope you have not given up on the camera as once they are working they are great.
Mine has no clunk, click or any other noise when i wind on yet it exposes ok
Everything else seems to work ok and the exposures are good so i try not to worry too much.
Shoot a roll and judge it on the results if you don't want it someone on rff will give it a home i'm sure.
Only thing i dont like is that the shutter button will not take a Rapidwinder softie
I taped over the lights on the top plate as in bright sunlight they were lighting up and confising the hell out of me