I made this one quite a while ago, but hadn't got around to getting any decent photos of it yet. These are probably decent enough...
It uses bike brake cables as strings, has dual piezo and inductive pickups. It also has some springs and strimmer wire strings added to the block with the piezo in which gives it more potential for noise making.
Ignore the thumbnail, but the vast majority of this track was made using this one instrument and a loopstation: