How to test benefits of optical flow improvements

Using Loiter with GPS lock so I let the pitch or roll stick spring back to center, not much I can do. For manual tune, a 3m rotation around the axis is sufficient. I hold the drone at 6m or more. The scaler values remain 0 (default) after in-flight calibration is completed. Hereflow I did it in one attempt. Interesting

Of course from the log, we can tell the calibration is not done. Not sure anything got to do with INS_LOG_BAT_MASK, not zero.