 Billy Sherwood eventually joined Yes for a few years and two albums before leaving again.In the mid-2000s, he organised two Pink Floyd tribute albums, "Back Against The Wall" and "Return To The Dark Side Of The Moon", and some further projects which featured an array of former and current Yes members as guests, including Kaye, White, Geoff Downes, Peter Banks, Bill Bruford, Steve Howe, and Rick Wakeman.Coming out of the second of these projects, Sherwood suggested to Kaye that they put together a project using former and current members of Yes.