I did do a layout in the forum for this, built it and its not quite right. Sounds like a very tame OD, not enough gain. I reckon i have made a mistake somewhere but haven't spotted it yet. Feel free to have a look and see where i have gone wrong, i used the pedal PCB schematic. I'll post this info in that post as well as not done so yet.
"Red velvet lines the black box"