This pedal does indeed sound really good. I built one a few years ago and made a post recommending it, too! The distortion portion of the circuit is a modded BSIAB II, look at the schematics and you will see it ✌️
I don’t know if he used it at the time, but he used a Mu-Tron Octave Divider (and now uses a Behringer (!!!) clone live) and he also used a Fender Blender in the 90s