Dave Merrill
Axe-Master
Agree, I turn guitar tone down and turn up low end too.I watched parts of it (I'm quite familiar with his setup already), the GNI part I watched. His signature overdrive is not a fuzz though, but I get what you meant.
What are you missing with the octafuzz in the Axe? Using the advanced parameters and the EQ, you can tailor it to your liking. I normal turn up the low end a bit, since they can be quite thin sounding if you don't turn down the tone control on the guitar (which is normally how you run those things).
What's missing to me is the kind of semi unpredictable octave jumping I hear in Winterland.