I dropped the project due to a cost vs. profit analysis. There was simply not enough demand nor profit in pursuing a gooseneck support. As you have demonstrated, you purchased a support for $6.00.
The Logitech works great, it will serve most teachers well. There are a few manufacturers offering below $200.00 systems. They are USB document scanners that can function quite well as a document camera.
Thanks for the info...JJC