This is a request. Fuzzdog tweaked a the classic Rat circuit a few years ago. It includes the "Reutz mod", a diode selector switch for assymetric silicon/LED clipping and a Marshall 3-band tonestack. The output buffer is tweaked into a gain recovery J FET stage to cover up the lossy tonestack. For a Sunn/Supergroup tonestack, just replace the 33k resistor with 56k and 470pF capacitor with 270pF.
