Support near Braunschweig, Germany

we are trying to get used with reach but as we are new at the RTK or use of Reach, we would need some knowledge showing us the use, the functionality for mapping applications in combination with arducopter 3.4. Connecting it to arducopter and setting the relevant parameters is fine. But with all the different possibilities in setting it up and configuration know-how (offline) would be appreciated. Is there anybody near Braunschweig (Germany) how can give us a hand?
Thanks, Chris