Tim Charles - Duh
Maynard James Keenan - Tool, A perfect circle
Mikael Akerfeldt - Opeth
Isahn - Emperor, Isahn
Lars Nedland - Asmegin, Age of Silence, Borknagar, Solefald
Andreas Hedlund - Vintersorg, Otyg, Borknagar, Fission, Waterclime, Cronian
Drew Mailloux - Rishloo
Ville Viljanen - Mors...