So I understand the rotation of the propellers (CW on motors 1 and 4 with "R" mark, CCW on motors 2 and 3 with "L" mark) but what I'm asking is what side the Racekraft props are installed? Obviously you want the letters and numbers on top but the problem is, THERE ARE LETTERS AND NUMBERS ON BOTH SIDES!! One side has the RK5040 marking on the center part and the other side has just 1 letter marking on one of the blades. Which side goes up? I looked all over their website and even emailed them but I'm sure I'll get a faster response here.