I screwed the snares (the cut halves of a whole 14" drum snare) to the dowel and lined them up so that when the dowel rolls forward in its holes, the snares brush the inside of the playing surface. IMG_7746 Technical Details Camera: iPhone 7 Taken: January 10, 2019 Focal length: 3mm Aperture: f/1 Exposure: 1/15 second ISO: 64