Hello all, this might have been answered before but i will tell my story and what happened .. Okay so i installed them **** rotor guards on my vision and flew it, it flew great well untill i descended too fast and entered "ring vortex state" this was an uncontrolled descend to the earth where it eventually flipped upside down and landed on on its top onto pavement. Well i didn't have anymore blades to test it after this. I just got some blades in and gave it a go.. well the thing is extremely unstable and very hard to control even in vision mode with 9 satellites... i just broke 6 blades and have no more until i get 4 more sets here... but the rest of my story... after the first failed attempt of breaking it i tried to re calibrate the ICU both basic and advanced, and calibrating the compass... same thing.. it really wanted to descend and drift really badly. and when it was in the air it was really wobbley. One other thing is the phone app did a warning at 47% battery which was odd to me. If anyone can help me out this would be cool, im thinking maybe the compass module is shot but i dont know maybe a motor or two? how do you test motors?