After leaving Quicksilver in October 1970 , Cipollina formed Copperhead , which was initially a loose and variable aggregation before coalescing around the less transitory lineup of Cipollina , Gary Philippet ( vocals , guitar and organ ) , Jim McPherson ( vocals , bass and piano ) , Pete Sears ( bass , piano ) , and David Weber ( drums ) . Although Clive Davis was particularly enamored of the group and signed them to a lucrative deal with Columbia Records , their eponymous 1973 debut failed to gain traction in the marketplace despite heavy touring , leading to Columbia refusing to release their second album and hastening their disbandment . Unable to secure a major label contract in the aftermath of the 1975 Quicksilver reunion , Cipollina continued to perform regularly with many other Bay Area acts , including one billed as Thunder and Lightning , a joint venture with Nick Gravenites , who had co-produced Quicksilver 's debut , and another billed as Fish and Chips , with Barry Melton ; Greg Elmore played drums for the former , Spencer Dryden for the latter , with Peter Albin on bass ; various bass players , including Albin and Roger Troy , played with the former . During the same period Cipollina became a founding member of The Dinosaurs in 1982 while continuing throughout the 80s to play club gigs with both other bands . In 1974 , Cipollina guested with Quicksilver-idolizing Welsh progressive rock group Man , playing with them at their 1974 Winterland concerts and on a subsequent UK tour ; these efforts resulted in the 1975 live album '' Maximum Darkness '' . He died in 1989 at the age of 45 from complications of emphysema exacerbated by Alpha 1-antitrypsin deficiency . Some of Cipollina 's equipment is displayed at the Rock and Roll Hall of Fame . Hopkins continued his career as a session and touring musician with a variety of acts , including Jefferson Airplane , the Rolling Stones ( most notably on '' Exile on Main St. '' and the group 's ensuing 1972 American tour ) , the Jerry Garcia Band and Joe Cocker . He died in September 1994 from complications resulting from intestinal surgery related to his lifelong battle with Crohn 's disease . In the 1980s , he joined the controversial Church of Scientology and credited the organization 's Purification Rundown with vanquishing his long struggle with substance abuse . Valenti underwent brain surgery for an arteriovenous malformation in the late 1980s ; despite suffering from short-term memory loss and struggling with the adverse effects of anti-convulsive medications , he continued to write songs and perform with various Marin County musicians until his sudden death in November 1994
1972 American tour
The Rolling Stones American Tour 1972
Quicksilver Messenger Service