I was going to sell this but it's kinda acting intermittently so I'll just give it away as I didn't spend a lot of money on it myself. It's working, B string is hot. Worse part for me is I spent a lot of time to shave down the casing to I can make it thinner so it fits on my guitar.
Sometimes some strings just kind of drown out, not sure why, maybe the strings on these guitars aren't a good fit. Don't know... repositioning it gets it going. I used a putty to mount it.
If you want to monkey with it and try it out, you pay for shipping and it's yours or meet me at Django in June...at which time I expect a pint at Northampton Brewery.
Picture upload isn't working, I'll put up the picture shortly...