By tweaking the design of the spring to which the magnetic read head was attached, the team was able to fine-tune the friction customers feel when swiping their card.
Since the video and audio read heads were several inches apart it was not possible to make a physical edit that would function correctly in both video and audio.
Applications of economic significance are measuring and calibration probes for the quality control of magnetic storage disks and read heads, with dimensions that will soon reach 20 nanometers and below.