Don Preston

in 1966 Preston began a long collaboration with Frank Zappa as the keyboardist of the original Mothers of Invention. Preston performed and recorded with Zappa until 1974. During that time he was music director for Meredith Monk[3] (with whom he had previously shared a house) and started recording and performing electronic music.

He is a co-founder of the Grandmothers and is still active with the band, completing an extensive tour in 2000 and later tours through 2016.
Don Preston 2009

Preston also appeared on-stage as a guest keyboardist with the Zappa tribute band Project/Object (featuring Zappa alumni Ike Willis and Napoleon Murphy Brock) for several shows in 2001, 2002 and 2016.

In 2002, Don Preston joined forces with Frank Zappa alumni Roy Estrada and Napoleon Murphy Brock, along with guitarist Ken Rosser, and drummer/percussionist Christopher Garcia to form the Grande Mothers Re:Invented.

Since then they have performed at numerous concerts and festivals throughout America, Canada and Europe, including Austria, Belgium, Croatia, Czech Republic, Denmark, England, Germany, Holland, Italy, Norway, and Switzerland. (In 2005, guitarist, Miroslav Tadic replaced Ken Rosser in the lineup.) Guitarist/Bassist Robbie "Seahag" Mangano has filled in for Miroslav Tadic on Grande Mothers tours in 2009 and 2010, and Tom Fowler is scheduled to replace Roy Estrada. Recently Preston has lectured at Cornell, Harvard, Yale, Sarah Laurence, University of Arizona, and the University of Belfast.