Sloved with an selfmade script which is triggered by an cronjob. Removes the events from my main database, collects the events from the other databases and insert's them into my main one.

Only tricky thing is the handling across multible Databases and to respect the categories field while building the querys and arrays.

An general sync function between other pical's or an batch importer would be an real nice addition for future versions.

Thanks for this awesome modul which im using now for more than 3 years!