Another interesting circuit design by ROG; using a hex invrter to emulate a Tubescreamer
Schematic and a writeup is avaiable HERE.
Note that the resistor labelled "X" in the schematic is replaced by a 500k trimpot so you dial in the right amount of clean signal. Set it at around 100k for single coils, 220k for normal humbuckers or set it to 500k for hot humbuckers.