Thats reminds of something I'd read. I new some of those mods you can find on youtube were the starting point of the Natas but I didn't know he'd stopped doing that mod until now. I can't remember where I read a lot about it (the natas). I knew the Girth and Grind controls were related to some Garnet amps tone circuits because I read some online discussion that included mike fortin.
that was probably the thread where Larry accused Mike of copying his Dino's bite/punch circuit just based on the fact that Fortin amps kicked Larry's ass on some amp shootout and that the Hulk also had a bass/treble tweaker
Mike educately responded and pointed where he got the idea of using a pre-gain EQ
he's a big Larry fan, and it's sad that Larry is such a douchebag now
I was a big Larry fan also, and 30% of what I know about amp circuits, I learned from his once helpful posts on a couple forums
I tried to contact him twice to ask for a simple opinion, and he was quite rude, unlike Fortin