Piezo Pickup for Acoustic Guitar

This was inspired by my earlier guitar pickup: http://www.thingiverse.com/thing:457172. It is built for my 4" (103mm) diameter sound hole. If you are interested in modifying for a different size, the Fusion 360 file is here: http://a360.co/1MgR28M

Check out the video of it in action: http://youtu.be/2kegVcVyiuk