The avuncular Robert D. Heinz encourages the young apprentice and sums up operation of the Springline Model 535 commercial electric 3-hole punch, punching transparent overlays (see Punch.1.mp3-Punch.4.mp3). Recorded 7/1/2009 using an MAudio MicroTrack 24/96 digital audio recorder and Sony ECM-MS907 stereo microphone. Subset of file0435.wav, which can be made available.