Chain slipping on new bike.
I picked up a lovely new Wilier last month and so far I've been loving it, with the exception that is of the rear gears being a little skippy.
Before I handed it back to the shop for its 400 mile service I adjusted the indexing myself and all appeared fine, on the workstand at least, on the road there was still evidence of skipping.
Post shop service there is still evidence of skipping which is slightly annoying.
Drivetrain is Campag Athena 11 with FSA SL-K cranks and a Miche cassette.
From reading reviews of the cassette I think that's the weaklink, many comments suggest swapping that for Campag alleviate the issue.
Of course having quite a chunk of money already I don't really want to have to splash out already but nor do I want poor shifting.