Just looked it up - (yup Billy cox) - from the JH website:
"This brand new collection couples the new feature-length documentary Music, Money, Madness . . . Jimi Hendrix In Maui with the accompanying live performances on both audio and video.
The film chronicles the Jimi Hendrix Experience’s storied visit to Maui, and how the band became ensnared with the ill-fated Rainbow Bridge movie and incorporates never-before-released
original footage and new interviews.
The Blu-ray includes the full documentary film plus all the footage from the two afternoon performances captured on July 30, 1970 mixed in both stereo and 5.1 surround sound.
Also included in the package is Live In Maui – a 2 CD set or 3 LP set featuring Hendrix, Billy Cox, and Mitch Mitchell at the height of their playing powers,
newly restored and mixed by longtime Hendrix engineer Eddie Kramer."
And from this site:
liveforlivemusic.com/news/jimi-hendrix-live-maui-documentary-rainbow-bridge/"Rainbow Bridge, for those unfamiliar, was a 1971 independent film produced by Hendrix’s then-manager Michael Jeffery that attempted to follow in the same vein as highly successful
1969 counterculture film Easy Rider.
The film, which focuses on a New York model that travels to Hawaii, was filmed with non-professional actors and no script.
Per Hendrix biographer Steven Roby, Wein and art director Melinda Mayweather “invited outrageous people to portray themselves in Rainbow Bridge.
They included dope smugglers, priests and nuns, acidheads, gays, groupies, environmentalists, and a group who claimed to be from Venus.”
When he found out the film was floundering, Jeffery brought in The Jimi Hendrix Experience to perform a concert to be included in the film on the side of the Haleakala volcano.
Although Hendrix performed two full, fifty-minute sets for the taping, technical issues led to only 17 minutes of film being deemed usable for Rainbow Bridge. Even in those 17 usable minutes,
the drum track was not properly recorded, so drummer Mitch Mitchell later overdubbed his parts at Electric Lady Studios in New York."
I think the wind made it hard to record.