I got a fleeting glance of this UFO back on 24-04-2015.
Today I confirmed my observation.
Here we have the Airborne Windsports Edge X582 ZK-UFO2 (c/n EX1061).
This is ex T1-6105 from Australia.
It was registered to Michael Johnson of Rangiora on 07-05-2015.
The UFO under wing markings have not stood the test of time very well.
But they are firmly placed on the instrument panel.