Although advertised as a beginner's guide, the guides were written by someone who does not speak English very well. Even if you need to replace the rotors, there are no instructions on the correct procedure. As a result, I lost the ability to take off after replacing the rotors. As I was about to toss the drone in the trash, I noticed that the box showed the main rotor blades rotated crosswise. I looked at my swap work and realized that I only had one rotor inverter while the opposite angle…