If your wondering how to build a quadcopter but are having problem or just want to know how to build one watch this it will help you!!!! Two things I forgot to mention in the video is that if your motor or one of them is kinda stalling it could be that your screws holding the motor are to long or the esc is bad. Occasionally it could be a bad soldering job. Second thing I forgot is you will need a battery to build the quadcopter.