Ok......right off the bat, without even getting in the air yet, and Im already having problems !!! None of my props will screw on to the appropriate motor shafts AND unless Im just getting too old, the advertised orientations do not match the literature. Instructions say that there are black dots on 2 of the shafts......Check and that they should install counter-clockwise, but the shafts with the black dots on them are marked clockwise !! WTF !!!