@A1axx Your car was mentioned in a other thread related to "rigid collars" but as I was told you actually converted the front to a Cup axle and didn't do the mod in question.
But there is something else that caught my attention related to something you said about original Renault drive shafts.
Is this related to "standard" or Cup ones? I'm asking because we've a guy over here that has a problem with wobbling under certain conditions mainly felt through the steering wheel. He has replaced many parts and checked lots of things but not measured the shaft(s) IIRC.
Btw, saw the "last night" photo on insta.