@kinderkram,
flight time with 600mAh lipos? I am planing my first hexa based on the M4, M4 is already on its way to me and some other stuff like KISS ESCs, motors and props, but the frame will have to wait a little bit, as Flyduino is overhauling the design of the NanoHexa so it wont be available before end of Q1 2015
Still have a few other things to do like Thrust measurement of the motor prop combination, building a Spektrum Tx module for my Graupner mx-20 HoTT so I do not need to use an additional receiver on the hexa.
But I am really eager to see it flying.