This project needs reviving as the initial idea wasn't exciting enough for me to continue with the development. There is new art in the form of John Martin's Sodom and Gomorrah, which provides some angsty inspiration.
For the new project I am thinking of trying a minimal component design, with a single transistor or transistor->diode clipper centre, and tone circuitry surrounding it. If I eliminate buffer circuitry I can reduce the component count down even further and the pedal will produce all sorts of crazy effects when used with different equipment.
More to come, hopefully.