Video demonstration is available for download here: http://sensitiveresearch.com/Ping%20stick/images/wall,%20edge%20emphasis.mov http://sensitiveresearch.com/Pi

Video demonstration is available for download here: http://sensitiveresearch.com/Ping%20stick/images/wall,%20edge%20emphasis.mov http://sensitiveresearch.com/Ping%20stick/images/wall,%20edg...