Number 3!
FZEQ, a 3-band equalizer and fuzz. I found the schematic on a random polish guitar website and have no idea if it works, but I’m willing to give it a shot. This is 25x100mm, so should make a 2.5cm Kosmo module and be small enough to be made as the super cheap JLCPCB “prototype” boards. The layout is pretty ugly but I got fed up with rerouting, so it is what it is. I don’t think I can make them much denser than this.
I also made a Rev 0.2 of the FWR since I realized I made a big mistake right after I sent it off to the printers…