Hello, Christoph! My name is Danny, and I work at the FreedomBox Foundation. I noticed that you’ve made your first contribution to our forum. Thanks for offering to help with this issue with the RPi3. And welcome to our community! Since you’re new, I want to make sure that you know about all the resources and support we offer our contributors. Check out our Welcome page for all the basic information about contributing and for the contact info of our core team: https://wiki.debian.org/FreedomBox/Welcome
I’m very happy to see that you’re interested in getting involved in our community! If you have the time, please do join one of our upcoming weekend progress calls and introduce yourself. We’re all here to help you, so don’t hesitate to reach out to members of the core team!