Response times here in the forum are quite fast. That’s one thing the community is very good at! 
If you type @ followed by a user name, they get notified that their name has been mentioned. I also wrote posts here and here asking the two for help.
So if they see the notification, they will respond here. Hopefully they see it before your stay in Berlin, so you can arrange a meetup.
I also modified the topic title (again), to attract more attention. 