A good example of this metalzone use is Pat O'Brien from Cannibal Corpse.
His live setup is: guitar -> metalzone -> triple recto
The latest 3 album was recorded with:
guitar -> metalzone -> triple recto (with gain maxed!)
(and no noise gate/suppressor)
The metalzone with 0 gain add a lot of attack to the amp...I'll try with my savage next week.
I saw cannibal corpse live 3 weeks ago and the guitar sound was incredible...awesome low end, crazy attack....fuckin brutal!