2021-12-25 : Have a look at the production model Feed the Boc Mate
Based on the 80's Boss DF-2 Super Feedbacker, this Lab Series #39 includes both Super Distortion and feedbacker circuit.
Left footswitch engage a crushing DS-1 styled distortion controlled by the the 3 Lvl-Tone-Disto knobs.
Right footswitch, when held, will start a feedback on the note you were playing. Frequency response of the feedback is controlled by the overtone knobs, going from dark to bright clean ear-bleeding tone.