Editing Quicksilver Messenger Service (section)

==Remnants and reunions==
After leaving Quicksilver in October 1970, Cipollina formed [[Copperhead (rock and roll band)|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)(Sears was to leave after a matter of months being replaced in 1972 by longtime [[Bonnie Raitt]] bassist [[James Hutchinson (musician)|James "Hutch" Hutchinson]], who appeared on the album and played with the band until its demise), and David Weber (drums).<ref>{{cite web|last=Ruhlmann|first=William|title=Copperhead|url=http://www.allmusic.com/artist/copperhead-mn0000127173|website=[[AllMusic]]|access-date=18 September 2016|archive-date=October 13, 2016|archive-url=https://web.archive.org/web/20161013223325/http://www.allmusic.com/artist/copperhead-mn0000127173|url-status=live}}</ref> 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. In 1974, Cipollina guested with Quicksilver-idolizing Welsh progressive rock group [[Man (band)|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]]''.<ref name= Logan-Woff /> 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 [[Dinosaurs (band)|the Dinosaurs]] in 1982 while continuing throughout the 80s to play club gigs with both other bands. 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 [[The Rolling Stones American Tour 1972|1972 American tour]]), the [[Jerry Garcia Band]] and [[Joe Cocker]]. 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. Hopkins died in September 1994 from complications resulting from intestinal surgery related to his lifelong battle with [[Crohn's disease]].

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.

In 1984 Gary Duncan resurrected the brand as ''Gary Duncan's Quicksilver'' and released several albums with a reconstituted lineup, including ''[[Peace By Piece]]'' in 1986, ''Shapeshifter Vols. 1 & 2'' in 1996, ''Shapeshifter Vols. 3 & 4'' and ''Strange Trim'' in 2006. He also issued several live albums and created a website, quicksilvermessengerservice.com. The group also toured as ''Quicksilver '96'', and after that on occasion through the early 2000s, with a lineup of Duncan, Michael Lewis (keyboards), Greg Errico (drums), Bobby Vega (bass), John Bird (guitar), and Tony Menjivar (percussion).

In 2006 Gary Duncan and David Freiberg launched a 40th-anniversary Quicksilver celebration tour as Quicksilver Messenger Service, with Bobby Vega (soon to be replaced by Keith Graves on bass), singer Linda Imperial (Freiberg's wife and contributor to Quicksilver projects before as a backup singer) and Jefferson Starship players [[Prairie Prince]] (drums) and Chris Smith (keyboards). Following a series of tours, Duncan left the band in 2009. He was replaced by Peter Harris, and the band continued as David Freiberg's Quicksilver Messenger Service.

Still active as of 2021, they often opened for the reconstituted Jefferson Starship (led by Freiberg and [[Paul Kantner]]) until Kantner's death in 2016.  Duncan died aged 72 on June 29, 2019, in [[Woodland, California]] after suffering a seizure and falling into a coma.<ref>{{Cite web|url=https://bestclassicbands.com/gary-duncan-obituary-6-29-19/|title=Gary Duncan, Quicksilver Messenger Service Guitarist, Dies|date=July 29, 2019|access-date=July 1, 2019|archive-date=June 30, 2019|archive-url=https://web.archive.org/web/20190630043116/https://bestclassicbands.com/gary-duncan-obituary-6-29-19/|url-status=live}}</ref>

Quicksilver Gold, a tribute band, formed in 2002. Members included Dino Valenti's son, Joli Valenti, as well as John Cipollina's brother, Mario Cipollina, and some members of [[Steve Kimock|Zero]]. This band broke up in 2004.<ref>{{cite web |url=http://www.bay-area-bands.com/bab00051.htm |title=Quicksilver Gold |publisher=Bay-area-bands.com |access-date=2011-10-13 |archive-date=June 5, 2008 |archive-url=https://web.archive.org/web/20080605174801/http://www.bay-area-bands.com/bab00051.htm |url-status=live }}</ref>