BOOM!
SIMPLICITY!
1 POT AND 2 SWITCHES!
6 TRANSISTORS RIPPING YOUR SIGNAL TO SHREDS!
THAT IS ALL YOU NEED TO KNOW!!!!!!!!
Oh and by the way this PCB will let you build a clone of the Harmonic Transformer by Death By Audio.
You can also get this as a kit from Musiking here
Klaus also did a way better job at describing what the pedal actually does than me...