An early member of Sebastian Hardie was Jon English (vocals, rhythm guitar), who starred as Judas Iscariot in the Australian version of the stage musical Jesus Christ Superstar in 1972 and subsequently had a solo career as a singer, actor and playwright.

A later member, Mario Millo (lead guitar, mandolin, vocals) became a multi-award winner for his television and movie music.

Millo and Pilt formed the band, Windchase, to release Symphinity in 1977, it was a heavier jazz-fusion album but didn't have chart success and they disbanded.

Covering songs from Rolling Stones, The Beatles, Otis Redding and Wilson Pickett they built a reputation in the Sydney pub scene.

[3] Late in 1971, English left Sebastian Hardie when he won the role of Judas Iscariot in the Australian stage production of Jesus Christ Superstar from May 1972.

They were Australia's first symphonic rock band and performed a 20-minute version of Mike Oldfield's Tubular Bells as part of their set; Millo was now writing more orchestrated and inventive original material.

[3][7] Produced by former member Jon English,[4] it achieved Gold status – selling 35,000 copies, while the related single "Rosanna", an instrumental track, peaked at No.

[8] Windchase played Sebastian Hardie's material which had been written by Millo and by 1977 started recording Symphinity, which was more jazz-fusion oriented.

During album sessions, Nethercote left to be replaced by Duncan McGuire (bass guitar, ex-Doug Parkinson in Focus, Ayers Rock).

[12] Original soundtracks released include Against the Wind (1978, with Jon English), World Safari II (1984), A Fortunate Life (1986), The Lighthorsemen (1989) and Brides of Christ (1991).

[13] At the Gimme Ted benefit concert on 10 March 2001 Sebastian Hardie performed "Openings" and then backed former member, Jon English, for two of his songs.

In 1993, Kononewsky composed the song, “See What we Can Be”, a recording produced with Jerry Speiser, drummer from the group Men at Work, for the launch of a second documentary.