God Forbid IV and Machine Head's last 2 I think used Line 6 Flextone II HD's for added thickness (even though the main tone was 5150).
i always wondered what the flextone head you can see in machine head's making of videos was used for. i'm not sure about TTAOTE, but the blackening to me sounds like 2 5150 tracks panned left/right to me, with the right track being rob and having a slightly brighter sound, which kinda leads to the conclusion that the flextone was used for clean stuff only.
any more detailed info?
on topic: i think illdisposed - there's something rotten in the state of denmark was tracked with a flextone I head IIRC. maybe also the cover album...retro IIRC.