split_text: He performs primarily as a solo artist , though he has collaborated extensively with a wide variety of high-profile artists such as Bill Laswell , Bootsy Collins , Bernie Worrell , Iggy Pop , Les Claypool , Serj Tankian , Bill Moseley , Mike Patton , Viggo Mortensen , That 1 Guy , Bassnectar , and was a member of Guns N ' Roses from 2000 to 2004 .