On Tuesday, February 20, 2018 at 2:28:18 AM UTC-5, Duster wrote:
A possible new world record was flown Feb 16, 2018!
Keith Essex - 500 km, 15 m glider, 255 kph, Omarama.
Subject to verification. Congrats

Interesting flight, must have been associated with the wave, those southern type Alps could have contributed.