Ok, I didn't get to mess with the amp today since I was working for fucking 12hrs BUT I worked with the engineer dude today and got time to ask a few questions.
He suggested that upping the value of the resistors in the Voltage Divider circuits to perhaps cut down on some gain.
For anyone interested, R53 and R54 (both 470K), are the ones I'm talking about changing, I may try some 1M resistors.
I had him take a look at the Texture control, and he thought it was fucking crazy because it would add so much distortion. haha.
Since I haven't been able to use this at even practice volumes yet, I haven't messed with the Texture control yet.
He mentioned that the Resonance and Presence controls were basically feedback loops to the phase inverter tube. I asked him if they were kinda like a tone stack, but he said they're a little different. BTW, these controls really seem to have quite an impact on the sound, the Resonance can really tighten or loosen up the lows - i'm guessing somewhat like a Dual Rec's bold/spongy switch.
Also, I asked him if I could mess anything up messing with the preamp section and he said not really, so that's cool! IMMA GO WYLD Y'ALLS!
ALSO ALSO: If anyone reading has any real amp mod/build experience, feel free as hell to chime in and help out. I've always tinkered with shit, but I've never gone quite in depth like this, so it's basically BEGINNER'S GUIDE TO FUCKING UP YOUR SHIT. damn.