I'm considering building an X8.
From what I understand so far, on a given arm, the top and bottom prop rotate in opposite directions - note I'm meaning the props themselves; the motors rotate in the same direction, but the lower motor is upside-down.
If I've got the above right, are all 8 motors controlled individually, or in pairs? I'd starting thinking in pairs, but now suspect they are 8 individuals as otherwise yaw can't be controlled.
Is that right?