As a huge Slash fan, I have always admired the subtle uses of various effects throughout Slash's repertoire. His octave fuzz is not used very often, but the times he does use it produce some very memorable riffs. My personal favorite is the intro riff for No More Heroes. The octave effect is ever present and produces a beautiful, singing tone with a seemingly infinite amount of sustain. I like to dial just a little bit of fuzz and a bunch of octave on top of an already dirty JTM45 for some really nice suboctave aggression. Slash fans, check it out!