Originally Posted by MikeHRC
How are you mounting the FBL unit - which tape? The wrong tape can cause issues.
Also I saw a picture of your 450 where you were using a cable tie to hold it - this will transfer vibes into the unit (unless you have the cable tie in fuel tubing or similar), also your FBL unit was not perpendicular to the main shaft
efx, I prefer to swap the RX and gyro locations (gyro inside frame, rx out) and like Mike says don't use tie with this gyro, I just use the double side foam tape.
Also have you check the gyro corrections on the bench, just move it hard to each side and check. I don't know if that gyro is like the zyx with an option for pirouette optimization also.