But if you do want to build it like Pete, then make a daughterboard of the Cornish Buffer. The input socket connects directly to the input of the bypass buffer. The output of the bypass buffer then goes to SS-2 input and daisy chains to the 3PDT stomp switch, lugs 1 and 4. The output from Volume 2 of the SS-2 will go to 3PDT lugs 3 and 6, and the output socket connects to 3PDT lugs 2 and 5.
The third pole of the 3PDT is used for LED switching as usual.
Info from Cornish about his very expensive and much sought after stompbox:
The Pete Cornish SS-2™ satisfies a tremendous void in the Musicians palette of tone colors. Totally different from any overdrive/distortion effect that has ever been previously available; it is amazingly responsive to changes in both Guitar volume and picking articulation. It has the best “bottom end retention” ever heard in an effect, whilst the mid-range is sweet and very transparent. The SS-2™ retains all the tonal nuances of your guitar and is subtle and yet capable of amazing power and sustain. Using the SS-2™ with a clean amp it is possible to progress from subtle overdriven amp sounds, through rhythmic crunch, up to a blues' lead. The tonal characteristics and dynamics of the guitar are maintained even when using this pedal at its maximum gain.