Am reading the manuals in preparation of my P1 quad's arrival. http://download.dji-innovations.com/downloads/nazam-v2/en/NAZA-M_Quick_Start_Guide_v1.24_en.pdf On page 6, there are two choices that apply to a quad: Quad-Rotor I - where the arms are like a cross with Motor 1 leading. Quad-Rotor X - where the arms are like an X with Motors 2 (left) and 1 (right) leading. I see from the figures that the front is different, but the motors and their rotation (CW & CCW) are the same. So why do they display both configs? Wouldn't X be the default?