ARTISTS:
Billy Corgan & Jeff Schroeder (Smashing Pumpkins)
Michael Wagener (music producer)
Richard Fortus (Guns N' Roses, The Dead Daisies)
Pat O'Brien (Cannibal Corpse)
Wolf Hoffmann (Accept)
Ahrue Luster (Ill Niño)
Joe Duplantier (Gojira)
Bjorn Thorsrud (music producer)
Tue Madsen (music producer)
George Bokos (guitarist, composer, producer and engineer)
Rick Beato (music producer)
... rest of the Salvation family.
Boris Carloff (artist, music producer and Soundevice studio)
Niklas "Dango" Källgren (Truckfighters)
Honza Homola (Wohnout)
Gwyn Ashton
Radim Hladík (Blue Effect)
Tomáš Vartecký (Kurtizány z 25. Avenue, Wanastowi Vjecy)
Paul De Maio
Honza Křížek (ex-Blue Effect)
Jarmut Gabriel (Jouly, ex-Krucipüsk)
Tomáš Hájìček (Krucipüsk)
Dietrick Hardwick (Mindcage)
Olda Krejčoves (Monkey Business, Okrej, Potpalto)
Miloš "Dodo" Doležal
Dan Fryml (The Barn studio, Mean Messiah)
Terka Pšenčíková (The Agony)
Matěj Káninský (ex-A Banquet)
Vlasta "Paste" Koritar (Colp)
Rob Koubik (Ingrowing, Antistar Production)
Charly Rey (Pulso, Geneses11 Guitar Lab studio)
Wolf (Street Machine)
Michal Pavlíček
Maťo Mišík and Luboš Moravec (Gingerhead)
Pedro DeLuxe
Evžen Hofmann (Kryštof, Taurus records)
Václav Bláha (Divokej Bill)
Dr. Hyenik (Forgotten Silence)
Jakub Vlachynský (Atari Terror, My3Avi)
Jakub Hájek (Atari Terror)
Pavel Těšínský (Satisfucktion)
Dušan Lébl (Plexis, Apple Juice)
Michal Skořepa (Stroy)
Michal Pixa (Visací Zámek)
Radim Marchal (Le Beng)
Hippo & Octavio (Overloaded)
Daniel Franc (Imodium)
Rafan Traxmandl (Pipes and Pints)
and many more ...