Question: Have musicians Hansi Kürsch and John Reis both performed as members of a band?

Blind Guardian is a German power metal band formed in the mid-1980s in Krefeld, West Germany.  They are often credited as one of the seminal and most influential bands in the power metal and speed metal subgenres.  Ten musicians have been a part of the band's line-up in its history, which has consisted of singer Hansi Kürsch, guitarists André Olbrich and Marcus Siepen, and drummer Frederik Ehmke since 2005. <SEP> John Reis (born 1969) and also known by the pseudonyms Speedo, Slasher, and The Swami is an American musician, singer, guitarist, record label owner, and disc jockey.  Prior to this he was the guitarist in the post-hardcore band Pitchfork, and also played in Drive Like Jehu during the early 1990s.  In 1999 he formed the Hot Snakes, and in 2000 also formed the Sultans, in which (as Slasher) he sang and originally played bass before switching to rhythm guitar.  He played in both these bands until their breakups in 2005 and 2007 respectively.  He also released a solo recording under the name Back Off Cupids, which was recorded in 1994 but not released until 1999.  Over the years he has performed in many other musical acts including Conservative Itch, Stacatto Reads, Custom Floor, and Beehive & the Barracudas.  He is the owner of Swami Records, a label he founded in 1999 (he uses the title The Swami in this capacity).  He frequently works with bands in a studio capacity and releases albums by many southern California groups through his label.  He also hosts the "Swami Sound System" program (previously on San Diego radio station 94.9 (KBZT), and now available on Slacker Radio).  Reis remains an influential figure in the San Diego underground music community and is currently performing with a new band named The Night Marchers.  He is best known as the singer and guitarist for the rock band Rocket from the Crypt, which he formed and fronted (as Speedo) for the entirety of its career from 1990 to 2005. <SEP>  He was also the bassist in Blind Guardian until the 1998 album "Nightfall in Middle-Earth". Hans Jürgen Kürsch, better known as Hansi Kürsch (born 10 August 1966 in Lank-Latum/Meerbusch, Germany), is a German musician best known for being the co-founder, lead vocalist, co-composer, and lyricist of power metal band Blind Guardian.  He also provides lead vocals for the band Demons and Wizards. <SEP> Ghost Ship is the first album by the San Diego, California, rock and roll band Sultans, released in 2000 by Swami Records.  Both the band and the album began as "side projects" for John Reis during time off from his main band, Rocket from the Crypt.  This was also the time at which Reis formed Hot Snakes.  Reis collaborated with drummer Tony Di Prima, bringing in Rocket From the Crypt guitarist Andy Stamets while Reis himself played the bass guitar (he is normally known as a guitarist).  The band chose the name Sultans for the project and recorded an introductory EP and "Ghost Ship", both of which were released that year on Reis' newly formed Swami label.  As Reis has a tradition of using different stage names or pseudonyms in his various projects, he chose to be known as "Slasher" in the Sultans, while Stamets chose the nickname "Black Flame".