While building a clone of the Tycobrahe Octavia, I perfboarded a second version for use as a stand-alone fuzz, without the transformer or diodes that create the octave-up effect.
I was curious about the sound after Aron Nelson mentioned on his forum that he really liked the fuzz of the Octavia.
And it sounds pretty good. What's interesting is that when the Intensity control is at minimum, it is very touch sensitive. From almost totally clean to pretty distorted just from picking variances. At maximum Intensity, it is a pretty thick all-out fuzz.
If you're itching for a new fuzz project, I recommend building the Octavia with a SPDT or DPDT switch to bypass the transformer/diodes output section.
Listen to the Untavia!