Hello all. I have a question. I was flying the cp today and i noticed that its making a loud sound from the blades. Like you cant hear the motor as much but the blades make like a thumping sound. Like the other 3d helis do during a quick 3d manuever or a fast manuever it goes ilke thump thump thump. The blades are not too tight on the grips i have them like ive always had them, i can hold the heli sideways and they wont fall but i can move them with my hand pretty easy. Could it be that i have too much pitch on the blades or something? Thanks!