I'd appreciate it if you would describe how you constructed the spring ring for your D104 head. Is that one of the original 1 inch deep heads with the tapped eyelet holes? I can't zoom in to get a close look but it seems like there are two eyelets at the top where on the later heads the connector hardware is located that seats into the desk stand. On mine, a 1937 Youngstown, the tapped holes are at roughly 2, 4, 8 and 10 o'clock with the cord exiting the back at 12 or 6 o'clock. A closeup photo of the spring ring would be great. I can't tell how it was constructed. Thanks in advance.