Hi, my Yaw axis is constantly drifting over time. The drifting is very slow, but after awhile it will accumulate and I end up with my camera not pointing straight, thus needing to re-adjust it. This is quite annoying over long aerial flights where it slowly drifted away from dead center and I end up with a very awkward video footage. I have already set the necessary deadband and all. In the monitoring menu, both the Acc and Gyro shows straight lines on all axis, but the it still drifts regardless. I've heard somewhere that gyro drift is normal, is this the case?