@Carb: The situation is indeed weird - I absolutely hate the situation, because frankly I love the design of the 210, but I keep on bumping into issues with manufacturing quality. I guess that's partially because the problems started in the first place: Once you come across all these replacement parts, chances are bigger that you (instead of someone who doesn't have these issues) come across faulty components again...
I know the issues I'm having are quite severe... but it seems I'm not the only one that's having issues with the driveline. A fellow club member (that janus referred to) is having similar wear problems on his 210V2, and I've seen other people with extreme outdrive wear issues too (who drove at a different club and on a different surface, as far as that should matter anyway). If you ask me, it's an issue that has become more prominent in later batches, so are the members at Mendip running old 210s - or in a silver can class?
To answer your question regarding the CVDs, I haven't used a grub screw in there, it's built as instructed in the manual.