Decided to try this idea out in an old enclosure before I spent the time to design and etch an enclosure for it. Good thing because it didn’t really work. It’s a simple piezo box — the idea was that it would clearly pick up the ringing/vibration of the bells, but it didn’t. It was there faintly but turning up enough to really hear it meant a huge THUMP every time a bell was struck. Oh well.