If you had an Unicorn Account you could see a chart with the price development of this module and the average price asked for this module.
I changed the NFB resistor to 10k and changed out the gain pot to an A100k. Much more usable distortion unlike the stock values. Now it sounds as the name implies rather than a Big Muff. Included is a 12V DC adapter to power the internal tube properly. Nine volts isn't enough to heat a 12ax7. I have a video on my YouTube channel demonstrating how this exact pedal sounds.

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