New member from Germany, SW Black Forest area

Hi guys,
I am a new member, located in Kirchzarten, a small town in the southwest of the Black Forest in Germany.
My (fuzzified) location is not very far from GoogleMap (47.966000 7.960000).
I am using a calibrated R45 Geiger Counter from 4n-gx.de, which utilises a CTC-5 (SBM-20) tube.
At the moment I am testing several slightly radioactive rocks that I can get a hold of. When I have "played" enough, I want to accomodate the counter tube outside of my roof window, connected with WiFi, to do longtime radiation measurements, along with my Respirable Dust measuring station (PM10, PM2.5).

Greetings,
mcmusic