Adam Dutkiewicz (Times Of Grace)

Alex Baillie & Paul Yage (Cognizance)

Ben Hutcherson & Phil Pendergrast (Khemmis)

Ben Savage, Alex Wade & Zach Householder (Whitechapel)

Bill Kelliher & Brent Hinds (Mastodon)

Brody Uttley & Jon Topore (Rivers Of Nihil)

Calle-Magnus Thomér & Daniel Bergström (Vildhjarta)

Chris Letchford (Scale The Summit)

Dave Murray, Adrian Smith & Janick Gers (Iron Maiden)

Dean Lamb & Tobi Morelli (Archspire)

Dino Cazares (Fear Factory)

Doc Coyle (Bad Wolves)

Erik Rutan & Rob Barrett (Cannibal Corpse)

Gary Holt & Lee Altus (Exodus)

Joe Duplantier & Christian Andreu (Gojira)

John Petrucci (Dream Theater, LTE)

Jonas Stålhammar & Martin Larsson (At The Gates)

Jonathan Hultén & Adam Zaars (Tribulation)

Jordan Buckley & Andy Williams (Every Time I Die)

Josh Fore & Diamond Rowe (Tetrarch)

Josh Middleton & Adam Christianson (Architects)

Kerry McCoy & Shiv Mehra (Deafheaven)

Kurt Ballou, Chelsea Wolfe, Ben Chisholm & Stephen Brodsky (Converge)

Lee McKinney (Born Of Osiris)

Matt Heafy & Corey Beaulieu (Trivium)

Matt Tuck & Michael Padget (Bullet For My Valentine)

Mike Stringer (Spiritbox)

Misha Mansoor (Bulb)

Nikita Kamprad & Nico Rausch (Der Weg Einer Freiheit)

Paul Waggoner & Dustie Waring (Between The Buried And Me)

Sammy Urwin & James Jackson (Employed To Serve)

Sean Price & Jesse Cash (Erra)

Stevic Mackay & Ro Hayes (Twelve Foot Ninja)

Wes Borland (Limp Bizkit)

Wes Hauch (Alluvial)

Zakk Wylde (Black Label Society)