Mr.Green- a black russian Big Muff Pi made with
 higher quality components, and with a 2 knob passive
 tone stack to take the place of the original one knober.
 it sounds fantastic, and is much more useable. also
 has some power decoupling/ filtering so that a power
 supply may be used, and the box is a far cry form the
 shoddy at best construction of the original...i know of
 at least five people who buy muff after muff, do to the
 fact that the black russians fall apart under normal use
 I thought wrapping it in grass was pretty funny............