This is a very cool project—a removable acoustic guitar pickup/sound hole cover. I have wanted to make this pickup for years, ever since I first saw these instructions for making an acoustic guitar sound hole cover from a CD/DVD: http://m.instructables.com/id/Make-a-CDDVD-Guitar-Sound-hole-Cover/?ALLSTEPS … Continue reading 9 Volt Power Adapter Acoustic Guitar Removeable Pickup