Could I suggest that the gyroscopic effect is to the right, not so noticable on the roll, but on the rotation point.
Effect on the "bottom of the disc",- 6 o'clock position, is for the disc to be "pushed forward", translate that 90 degrees - 9 o'clock position force push to the right, i.e. right yaw.
If that makes sense.
I stand to be corrected.