Thanks for the replies. Just to be clear, I'm new to RWG2 and RWI, but I've been on RWG1 and TRC for a year and a half (changed my screen name this year) and have bought DateJusts from a few great dealers on the boards. Never had a mechanical problem with them but, yes, the recent discussions have caused me some concern. And though I've read quite a lot, I don't remember any posts about real vs copy ETA 2836-2 movements in DateJust reps. Thinking about buying another, so that's why I asked this specific question.
Anyway, thanks again Andy and By-Tor for your replies. Eager to learn more.