I am trying to fly an AeroSky C6 RC 6 Channel Carbon Quadcopter Almost Ready to Fly that I modified by installing a PIxhawk flight controller, switch, buzzer, and compass. As the Radio, I am using an FR Sky Taranis. I did the whole set up on Mission Planner, ESC and motor calibration, and props are in the correct orientation. The quad only lifted about 10 ft , and it was also very erractic/unstable flight. I would appreciate any other advice as far as what could be the problem.
I could not attach any video because they were too long- over 7 MB, so I am attaching a picture.