the Muff shot made by LofiMind Effects, 
Big Footz units are built in Ram´s head inspired PCB, using the BC239 transistor as a starting point.
the scheme runs between the Ram's Head, (V2-V3) built point-to-point (like the V1) and graphically inspired by the V6 of the late 70s.
It has the classic Volume, Tone and Sustain controls, getting much closer in sound to a bender than to a big muff.
Part of the V2s from the 70s do not add volume to your signal. With the Big Footz at 12-13 o'clock we get to equalize the signal, leaving plenty of knob travel to add volume to our guitar signal.
the sound is super-crystalline and articulate, it doesn't squash notes like the more standard Muff's, so the tone knob is usable all the way around and has a very good sound.
 
CONTROLS:
 
 
the Big footz has the three typical controls Volume Tone and Sustain
The volume control becomes unity with the signal volume at 12 o'clock and then becomes a booster. 
The Tone control is marked by the Fat and Treble indicators, by moving the potentiometer to one of these sides, we fatten or sharpen the sound.
 
 
SPECS:
 
The Big Footz can be powered by either 9V batteries or power supplies.
It uses 2.1 boss type barrels, with negative center, and to avoid noise and leaks, it uses an Isolda power supply. if you don't use an isolated power supply, this noise/oscillation could leak to the other pedals even when the pedal is off. 
please avoid the power supply daisy chain.