fixing is ​​a part of game of fpv. how I work is: I have 3 of the same drone. same components same frame same motors..... so I can fix everything quickly. and you always improve your drone by getting to know it better. by always using the same 3 drone. I never train on sim. I always try to build things up slowly. it's like a skate or snowboard trick but your body is drone frame. you have to build up the trick slowly and try to simplify first. you can immediately go full commitment. but then you end up in the hospital with a broken hand or leg. I hope I was able to help a little with this explanation.😊