Later new wings were built with an Eppler 414 airfoil to improve low-speed performance.

[2] In its original configuration Johnson flew the Adastra in the 1960 World Gliding Championships in Cologne, West Germany and finished in 15th place.

After extending the wing chord and altering the airfoil he flew it in the US Nationals to a seventh-place finish in 1961 and second place in 1962.

The National Soaring Museum lists the aircraft as being part of their collection and in storage.

[2][3][4] Data from The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II[1]General characteristics Performance