I am a 3d flyer this is my first EDF and right now I can make it hover it just falls backwards vertical. The same thing I can do with 40 percent yak or edge. If it had more power I could hover. I have also triple rates on my transmitter. First two rates are factory spec and third is as far as control surfaces will possibly go which in highspeed would probably rip a control surface off in flight. This third rate is what I call Ninja rates.
It won't fall all the way down to the ground inverted but about 5 or 6 feet before it falls over on either side. Power out of a stall is very poor so I wont be hovering anywhere near the ground any time soon. unless I have extreme power. I also tried 5s and 6s with stock EDF setup and 5s wasnt worth the gain and 6s the motor hated. It would peak out real hard then drop off like a timing issue. I only took off did one lap and landed in fear of destroying something. Everything was fine but I do not recommend lol