Glad to see that you got it sorted! No worries, I'll hold on to my spare rim for the next month in case you do end up needing it.
That exact weekend you are planning to be in Vienna I am actually riding down to the south of Austria (Carinthia / Kärnten) to meet up with a couple of other bikers. I am going to take the scenic route down there on Thursday afternoon if you want to join? You could either ride back to Vienna on Friday or hang with us for the weekend and check out the best riding in the area, including Slovenia and the North of Italy.
Let me know!