Question: In what year did Tim Gaines leave the band whose eleventh release was "The Roxx Regime Demos"?

full_context: Document 1: To Hell with the Devil: To Hell with the Devil is the Grammy Award nominated third release, and third studio album, by the Christian metal and glam metal band Stryper, released in 1986. It was the first Christian metal album to achieve platinum status, selling over one million copies. It remained the best-selling Christian metal album until P.O.D.'s "Satellite" in 2001.
Document 2: Stryper: Stryper is an American Christian metal band from Orange County, California. The group's lineup consists of Michael Sweet (lead vocals, guitar), Oz Fox (guitar), Tim Gaines (bass guitar), and Robert Sweet (drums). In 2004, Gaines left the band and was replaced by Tracy Ferrie (bass guitar) but rejoined in 2009, only to be fired after tension between the band, Gaines and his new wife.
Document 3: Sounding the Seventh Trumpet: Sounding the Seventh Trumpet is the debut studio album by American heavy metal band Avenged Sevenfold, released on June 10, 2001 by Good Life Recordings, and re-released by Hopeless Records on March 19, 2002, featuring slightly different cover art. The album was recorded in November 2000 at Westbeach Recorders in California. Although the album only sold 300 copies in its first week of release, it has sold 370,000 copies worldwide with 310,000 sold in United States, as of November 2010. The title 'Sounding the Seventh Trumpet' takes its name from the Book of Revelation, specifically referencing chapter 11 and the sounding of the last (seventh) trumpet, showing the end of the world. Valary DiBenedetto (M. Shadows' future wife) performs vocals on the track "The Art of Subconscious Illusion." The album was released as 2x12 vinyl, LP, 33 ⅓ RPM, Purple on 2008 in US.
Document 4: The Seventh Song: "The 7th Song, Enchanting Guitar Melodies (Archives Vol. 1)" is a 2000 album by guitarist Steve Vai. It is his first compilation album, but unlike a standard "greatest hits" or "best of" album, all of the songs on it (save for the three new tracks and the hidden track) can be found on one of Vai's previous albums as the 7th track. The 7th track on each of his albums is meant to be the most emotional and well articulated piece on the album. "Christmas Time is Here", while not previously released on a Vai album, can nonetheless be found as the 7th track on the 1996 Christmas compilation, Merry Axemas.
Document 5: Seven Churches (album): Seven Churches is the debut album by American death metal band Possessed. The title of the album refers to the Seven Churches of Asia mentioned in the Book of Revelation. "The Exorcist" begins with producer Randy Burns' version of Mike Oldfield's "Tubular Bells", arranged and performed as it was in the 1973 horror film of the same name. About.com ranked the album first in its list of "10 Essential Death Metal albums".
Document 6: Seven (Wolfstone album): Seven is the fifth studio album by the Scottish Celtic rock band Wolfstone. After the release of the band's previous album "The Half Tail" in 1996, numerous members left the band, and due to poor management, the band "split up" in 1998 after the band's label Green Linnet Records released an unrelated side-project as the Wolfstone album "This Strange Place" in early 1998. However, still contractually obliged to record another album for Green Linnet Records, the remaining members of the band regrouped chose to write and record the required album with full attention, rather than make a "half-hearted" album. Bassist Wayne Mackenzie said "we could have just gone through the motions and made a half-hearted attempt at an album, but we didn’t. The band and our fans mean far too much to us to do that." Titling the album "Seven" after where the album sits in the band's canonical album sequence, the album style was described as a particularly rock-edged variation of Celtic rock, although it does feature some mellower tracks. The album contains a mix between songs and instrumentals and diverse subject matter.
Document 7: ReliXIV: ReliXIV is the thirteenth full-length studio album by American thrash metal band Overkill, released in spring 2005. The reason the Roman numeral 14 is included in the title is because the band includes the "Overkill EP" in their lineup of studio albums, which would make this album the 14th by their chronology. It can also be because Overkill released the covers album "Coverkill", which would have been their eleventh studio album. While this diction left it unclear how the title was to be pronounced, Blitz just mentioned it as "Relics" when announcing songs from the album on stage. The album produced the popular "Old School", which has been played at every Overkill show since it was first released. As of late 2007, ReliXIV sold over 16,000 copies in the U.S.
Document 8: The Strap-Ons: The Strap-Ons are a punk rock band formed by vocalist Brian "Idle" Diederich, guitarist Billy England, bassist Emmit Joe George and drummer Ruben Remulla. A few months later, guitarist Kate Grottenhaler joined the group. The band formed in late 1996 originally as The Pimps in Norfolk, Virginia, but due to legal disputes, were forced to change their name to The Strap-Ons. The band's first CD was put out by a cooperative of six labels around the world called The World Label Cooperative.
Document 9: The Roxx Regime Demos: The Roxx Regime Demos is the eleventh release and third compilation album by Stryper consisting of songs originally released under the band's previous name, Roxx Regime, except for the track "Honestly", which is taken from a later demo. While the album's general release was on July 10, 2007, pre-sale purchases at Stryper.com shipped on July 7, 2007, a reference to 777, a holy number in Christianity and one that used to appear onstage at Stryper concerts.
Document 10: The Stryder: The Stryder was a band hailing from Long Island, NY. The Band was formed by Peter Toh and Scottie Redix in 1999 after their previous project, Yearly, disbanded following the departure of bassist Eben D'amico who left to join Saves the Day. They added a vocalist and bassist, John Johansen and Nick Wendel (Respectively). They released a 7" on Elkion Records titled "The Hits Just Keep on Comin" and shortly after signed a deal to Equal Vision Records and released their debut album "Masquerade in the Key of Crime" in the summer 2000. The band toured extensively and began writing new material in 2001. They added former Glassjaw drummer Durijah Lang, and moved Scottie Redix up to Guitar and backing vocals. In the summer of 2001 the band parted ways with vocalist John Johansen. 2002 saw the release of "Jungle City Twitch". Debuting a new sound, The Stryder continued to tour the country in support of the new release. In 2003/2004, Elkion Records released "Savor The Danger" which contained a collection of old demos and the 2 songs from the 7" previously released on the label. Peter released his first solo EP "Cleopatra" in 2004 on Elkion Records. Durijah moved on to become the drummer of Classic Case and in 2007, became Pete Parada's replacement in Saves The Day. In 2006, Peter then went on to start an Internet TV/New Media Company, Hidden Track TV with Adam Schleichkorn, and released a solo EP titled "Shoes of a Beast". Peter is currently working on his first full-length album, titled "Wildlife". Scottie Redix now plays under the moniker 'Cassonova Brown' and is currently working on his first full-length. The Working title for the album is"On the Wall" and there are 2demos available on Soundcloud.com. Scottie is also a member of the musical collective Teachers, who also have a full-length album titled "Anesthesia" slated for an early 2013 release. Teachers contributed to Kanye West's "Monster".
Document 11: Robert Sweet (musician): Robert Lee Sweet (born March 21, 1960 in Lynwood, California) is the drummer of the Christian metal band Stryper. He and his brother Michael founded the band as Roxx or Roxx Regime. Robert became known as the "Visual Time Keeper" for his wild drumming and captivating drum kits. Unlike most drummers, Sweet faces in the direction of stage left or right while playing, not straight ahead, so that the audience can see him and not have their view of him obscured by his drumkit. Sweet also played a key role in the visual direction of the band itself as well as being a significant contributor to the group.
Document 12: The Yellow and Black Attack Is Back!: The Yellow and Black Attack Is Back! is a Stryper tribute album by Christian rock band Guardian. The album is a re-make of Stryper's debut EP "The Yellow and Black Attack" from 1984. This record was released in 1999. The cover-artwork is also based on Stryper's version, with the four missiles on it, featuring the initials of each band's member as it is shown on the original cover: "MS" stands for Michael Sweet, "RS" for Robert Sweet, "OF" for Oz Fox, and "TG" for Tim Gaines; here the initials are: "JR" for Jamie Rowe, "TP" for Tony Palacios, "KN" for Karl Ney, and "DB" for David Bach.
Document 13: List of Avenged Sevenfold members: Avenged Sevenfold is an American heavy metal band from Huntington Beach, California. Formed in 1999, the group originally featured vocalist M. Shadows (Matthew Sanders), guitarist Zacky Vengeance (Zachary Baker), bassist Matt Wendt and drummer The Rev (James Sullivan). Wendt was replaced early by Justin Sane (Justin Meacham), who performed on the group's debut album "Sounding the Seventh Trumpet" before leaving the band the following year after attempting to commit suicide. Dameon Ash (Frank Melcom) replaced Meacham for the album's promotional touring cycle, while lead guitarist Synyster Gates (Brian Haner, Jr.) joined the band after the album's initial release. Johnny Christ (Jonathan Seward) became Avenged Sevenfold's fourth bassist in time for the recording of the 2003 album "Waking the Fallen".
Document 14: SinDizzy: Sin Dizzy was a Christian metal band co-founded by former Stryper members Oz Fox and Tim Gaines. The band was founded in the mid-1990s after Stryper had disbanded. Its members included young drummer and lead guitarist . Bass player Gaines described their sound as "a cross between [the] Stone Temple Pilots and Nirvana".
Document 15: Tracy Ferrie: Tracy Ferrie is an American musician, who is the current bass player for the classic rock band Boston and was the former bass player of Christian metal band Stryper. Beginning in 1996, Tracy played bass for Michael Sweet's solo band and was also a member of the bands Electrik, Sally Steele, Seraiah, Whitecross, Guardian, Rebecca St. James, Plumb, Sonicflood and Strange Celebrity. He is from Elkhart, Indiana and a national roller skating champion.
ground_truth: 2004