It's a Aion Lumitron clone that I've modded with the "Moog" style filter switch you see around (which does something to the tone) and a decay control.
I've got a bug I need to find where there's a noise getting into the the audio signal in up mode...
Playing it a bit over lunch it does some nice stuff, I actually got some quite cool things in HP using a long delay to be like a slow attack thing... LP is cool... feeding octave and fuzzy od into it brings smiles to your face as expected... there's a certain warmth to the sound and it sounds like part of the basses sounds...
When I started trying analogue octave pedals there was a massive difference (for me) between what I could get on the SA C4 (and HX, and Zoom) and analogue pedals - the analogue was just warmer and more usable musically... again that's just me, but there was something in the attack of the note on the C4 that kept bugging me.
The difference between the filters on the C4, this mutron clone and the few others I've tried is no where near as large