Sorry...if I knew I would help you. I have stayed away from those off-brand quadcopters for this very reason.....some bad Q/C and hard to find help for them. The best place for help is probably the Hobbyking forums or the comment section below the page that sells them - or, Rcgroups, which specializes in more technical aspects of this hobby. Here is the Quantum discussion there: (Same as the Cx-20) http://www.rcgroups.com/forums/showthread.php?t=2112759
