Its that time for new chain and sprockets, still have the originals so that includes the 9mm nut, kept an eye on it due to known problems but all was well.
Sooo ordered a new nut and locking washer from my dealer and a new 9mm nut turns up. Apparently its all up to date, but why a 9mm nut and not the 12mm nut if there are known problems.
Shall I get a 12mm nut from wemoto?
Cheers
Nick