This is one of the sleeper guitar/bass pedals out there. You can buy these for 30-40€ (here in Finland) and with some modifications it turns into a versatile and great sounding distortion pedal.
In it’s stock form it has a very bright and harsh tone which I’ve fixed by changing tone shaping capacitors and clipping diode type. Now it can do crunch tones also and has much more pleasant high end. Capacitor values were chosen for bass use and it has massive low end now. This pedal was modded for Electric Fox Studios to be used as a bass distortion and the guys seem to be quite happy with it ;)
Here are some pics of the insides. I don’t want to reveal the cap values or diodes used but if you’re observant there is plenty of info in the pictures!