This is side "A" of the Duellist dual pedal released as a standalone effect. It's got a couple of changes from what's inside the Duellist, but overall pretty close.
Basically a stripped-down Tube Screamer (Son of Screamer) with several tone options.
Full tracing journal: (includes Duellist and Heavyhand)
https://aionfx.com/news/tracing-journal ... heavyhand/
PCB:
https://aionfx.com/project/gladius-dynamic-overdrive
King Tone Soloist
- aion
- Solder Soldier