To answer some questions: No it's not the Big Bottom, I didn't have the Metal Shop addon on this song, but I think I used the 2001 Treadplate Dual + screamer.
The "bass" is my guitar recorded with a cleansound with added low-end and some distortion and then just pitched with the default option in cubase -12 semitones.
And yes, I love the Bulb-ish stuff. Wish I had a sevenstring.