Made a DIY PUP out of Ratshack parts today. It sounds freakishly good considering $7.50 worth of parts. I used the bigger model piezo buzzer, wafered it with cardboard and electrical tape, attached it to a 1/4" jack and plugged it in. Dang thing actually worked. I'm using putty to attach the piezo to the body Dyn B style. Huge thump, good sustain. Need to gig test it but I like it. It has a little mid-range howl easily eq'd out. If I had a way to post sound clips I would. Just thought I'd let you guys know.