Three weeks of daily rain and the snow made the maiden flight of my M4 Max impossible. I almost went crazy! Now she is up in the air and I am in love from the very first flight! The bigger motor is so powerful that you can fly the M4 Max with much lower headspeed than the M4 and get the same performance. The dominating sound are the main rotor blades ande they are creating the best music! If you love low RPM you will love the M4 Max! No doubt!!