All the diagrams I see (e.g. http://ardupilot.org/copter/_images/MOTORS_QuadX_QuadPlus.jpg) show motors 1 and 2 being CCW and motors 3 and 4 being CW
I have motors with self locking nuts but have managed to get them the wrong way round and its going to be tricky to swap them.
Does it matter if motors 1 and 2 are the CW and 3 and 4 are CCW? I cant see how it would make a difference as long as they are alternating since the FC just increases, decreases power, and the rotational force still cancels out or have I missed something?