I dont know, but it works very well (tried it on my EKO 700 and Stratocaster) Humbucker types seem a bit more pronounced, but it works like a charm nonetheless. Very greenringeresque.
Hmm... Tried this... Too short decay, and rather splatty. Must be one of those effects that like single coils better than humbuckers. I have a les paul special II.
Very octaveish, though.
sorry for the late reply, im on holiday and have limited access to internet. you could try swapping the 22nf for a 47nf and putting a booster in front of the pedal. I tried with a lpb1 and gives your more sustain / fuzz and makes it less splattery (if thats what you like)