When trying to add an attachment, I could not find the intended object in the repository, as I could not remember the name I had given it. I had to abort making the calendar event, return to the repository to check the name (which I could easily recognise when I actually saw the name), return once more to the calendar, make the calendar event again, the find the right attachment in the rep.
Suggestion: Could a smallish feature be implemented that allows us to browse the rep (without actually having to leave the calendar tool)? E.g. by showing the whole rep when "???" is used as a search query? Or by just showing the whole rep structure even before a search query is entered?