• Geezer Butler (Black Sabbath, G/Z/R, )
• Robert Trujillo (Infectious Grooves, Suicidal Tendencies)
• Ryan Martinie (Mudvayne, Soften The Glare)
• Mike Inez ( Alice in Chains°, Black Label Society, Heart, others )
• Cici Powel
• Tim Commerford ( RATM, Audioslave, Prophets Of Rage, Wakrat, others )
• (Botanist)
• (Fetid)
• (Death?)
• (Sick of it All?)
• (Soilent Green)
• (My Dying Bride?)
• (Salem?)

° Mike Star did some great work on the first couple albums.