I did some extensive testing with ver 15.09, the servos jumps as I increase throttle. Looks like its a ver 15.09 native glitch. after running transmitter calibration several times, I was able to fix it. I have been flying several helis with cc3d since last summer openpilot ver 15.02.02 never had any issues as such. here are some UAV files from my helis if anyone likes to experiment with. Specs: trex450 compatible, open pilot ver 15.02.02, CC3D, and cc3d atom