 Gray produced their 1999 album, "Q2K", and plays on the 2001 live album and DVD, "Live Evolution".In 2000, Gray also collaborated with Queensrÿche drummer Scott Rockenfield and the Brother Cane members Damon Johnson and Roman Glick in the hard rock project Slave to the System, recording one eponymous album, which was released independently in 2002, and re-released in 2006 on Spitfire Records.In recent years, Gray's involvement with Queensrÿche has increased.