just got a kk ( 4.7 xcopter firmware ) board to mess around with and get my old 450 going, man this thing is kicking my ass! Finally got it all working ( damn manual had the wrong motor numbers so nothing worked right at first ) after i got that figured it flies but the yaw is horrible! i have reversed the gyro about 6 times with the usb programmer, still acts the same, tried it with the tx and still no go. I give it an input and it just keeps spinning, if you give it some left it will stop after about 180 degrees and go right, have no idea. It seems like the yaw gyro is not working at all but im not sure if it would even fly if that was the case. any help would be appreciated.