I have recently stumbled upon this setting as well. I have MV around 6 - 8 and Gain around 1 as well. Gorgeous tones! I now use this anytime I'm after the metal face Plexi type tone. Gain will vary between 1 and 4, depending on the exact tone I'm after. Also got a good Sabbath tone with MV on 10 (along with some extreme EQ settings). I had no idea how versatile this amp was when I first got it.