Clone PCB of the Spaceman Effects Aphelion Harmonic Overdrive. A wonderfully touch sensitive overdrive, thanks in part to the CA3080 OTA used in this circuit. very versatile indeed. Never overpowering, it can simply spice up a clean channel, or add a bit more crunchiness to an overdrive channel. The tone section is full range at the noon position, cut low/boost high at one end, or cut high/boost low at the other end. Very versatile indeed. Fly as close to the sun as you wish, there's no melting these wings.
While the 3080 isn't super common nowadays, veritable units are still available at Smallbear for builders in North America, and at Banzai for the European builders.