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Andy La Rocque (King Diamond, Sonic Train Studios)
Richard Lainegard (MMP)
Simon Johansson (Wolf, Soilwork, Solna Sound Recording)
Arnold Lindberg (FOH: Ghost, King Diamond, Inflames)
Sid Wilson (Slipknot)
Shawn Crahan (Slipknot)
Henrik Danhage (Evergrey, Death Destruction)
Fredrik Nordström (Studio Fredman, Dream Evil)
Olle Junholm (Producer, Session Guitarist)
Jim Root (Slipknot)
Mick Thomson (Slipknot)
Stefan Lindholm (Vindictiv)
Pontus Norgren (Hammerfall, FOH King Diamond)
Kevin Kaceli (Session Guitarist)
Corey Tailor (Slipknot, Stone Sour)
Alessandro Venturella (Slipknot)
Bob Strakele (FOH: Slipknot)
Kalle Moraeus (ABBA-Benny Anderssons Orkester)
Labinot Gashi (G4shi)
Marcos Ubeda (Kaiak)
Jörgen Alnevall (The Sign)
Sebastian Mullaert (Circle of Live, Minilogue)
Robert Kukla (Obsidian Recording Studios)
Kjell Börve (Gear Addict)
Mathias Karnblad (MUG)
Niclas Mellander (Guitar Tech: DIO, UFO)
Pär Stålfors (Oxidize)
Markus Hamburger (Grand Noise Studios)
Davey Barnes (Virgin Studios)
Marlon Enrique Tepedino Cabello (Mundo Venezuela)
Magnus Ax (Swedish Erotica)
Igor Georgievski (HE)