Per request.
Schematic is avaiable HERE.
As many others, I thought this was just a clone or a close derivate to the Boss HM2. We couldn't be more wrong. Vitali from drunk beaver pedals opladed a schematic for it and it reveals a quite an interesting circuit. The distortion section resembles Boss DS2 with a discrete op amp and hard clipping diodes.
The 3-band eq section is fairly unique. Mid control is basically a volume control for the raw unfiltered signal. Low is built around a 3rd order Sallen key filter and the High control is driven with an active dual high pass filter not dissimilar to one of the filters found in EHX Knockout.
The layout turned out quite big with all these transistors and op amps so it is intended for a BB enclosure.
Schematic is avaiable HERE.
There is two layouts for this one. One for an audio transformer and one for a fasel inductor.
Transformer layout
A quite interesting one. It is basically an old Tim Escobedo circuit (Punch in the Face silicon/FET fuzz face variant) sandwished between two op amp gainstages. The input cap is only at 220pF, try 4,7nF-10nF to fatten things up a bit. A trimpot is added for easy biasing for the J FET. Stock fixed value is 5,6k.
Schematic is avaiable HERE.