Lygra,
Yes, I have a clear idea what I feel would work for the QuadDSO navigation and menu system as I work with test equipment every day in my work. But rather than to explain it now, I feel it would be better to just get the base plane coded first, and then to see preliminary how it works. Changes and ideas can easily then be incorporated into the model if needed.
I have not got a Nano, but if you have a video of the latest Nano navigation and Menu system in action, that I would find useful and interesting to see.