Hi John!
The first time I sent it away to Rolex UK, they said they couldn't find anything wrong with it. I accepted their appraisal and forgot about it until 2 weeks ago when it took 4 attempts to get the crown to screw in. It kept starting on the wrong thread goin on at an almost / angle when looking down onto the watch face(I always take my watches off to wind them and have followed other Rolex wearers advice about turning the crown anti-clockwise first to line up the threads). I immediately unscrew it and start again.
I'm assuming that this is not normal, since I have never had a problem like this with my Omegas. My real concern is water resistance. i do not dive with it, but it gets a dunk in the sink. I hope my watch isn't ruined.

Regards Joseph-John.