Thanks for the feedback.
I tried to open the shell but the screws are really tight and two didn’t move.
As I am on tour right now I will try it back at home with some better tools.
However, as you asked about the Antennas, I noticed that the external connectors are quite loose. They can be easily disconnected by slightly pulling the cable. Only the GPS and one 2.4GHz connector feel more “secure”.
Is there something I can do?