Tobias from the band Green Orbit have traced a few pedals from a now obsolete producer called Black Effect Pedals. They were producing mostly fuzzes on the heavier end of the scale, suited for doom and stoner toanz.
Lava Machine is based on Univox Unidrive with some tweaks and addons. Two onboard trimpots to tune in bias and the input signal, The gain control affect the negative feedback between the output buffer and input transistor and it has a treble cut tone control. According to Tobias it does boost, overdrive and fuzztone really well by using your guitar volume control.
