Thanks to a reader I now know that the KN-920 is designed by BA6BF. Some videos show the KN-920 in action and allow you to take a peek inside. These videos are hosted on YOUKU, an Asian YouTube.
Go to http://v.youku.com/v_show/id_XNTMyNDQ2Njgw.html and take a look. Related videos are shown at the right side of the screen.