The completed doc hasn't been posted yet, in the meantime...
Parts list is here:
Sproing Deluxe Drill Template
forum.pedalpcb.com
Drill template is here:
The wiring is fairly straightforward:
Input/Output jacks connect to the IN/OUT pads at the top of the PCB
9V / GND connect to the +/- pads at the top of the PCB
The two 3PDT breakout boards are pin-for-pin direct connections to the pads at the bottom of the PCB
The only "gotcha" on this one is the two 9mm potentiometers.