Here is a layout I use for the Distortion Plus. I call it the 741 Distortion because it uses a UA741 or LM741 single OpAmp. The only difference it has than the Distortion Plus is the 82p capacitor in the non-inverting feedback gain stage, connecting pin 6 to pin 2. It works great! It can really can scream! This is my favorite distortion pedal by far.