HaLeiVi: No, that’s just the only one that works that smoothly to explain :). The next highest register would be the same except that the D is different fingering.
I only started relatively recently, but I can play the low, middle, and up to G of the high register.
Yes, two flutes could each play half of the piano music, but what’s the point? I like playing by myself as well as with others.
Besides, lots of times piano music has those weird chord notations on it. I don’t play the piano, so I don’t really know a lot about what I’m talking about except that I’ve tried to use piano music occasionally and haven’t been able to.