Here are all of the URLs form the Sky & Telescope article plus a couple of others found among the links in those sites.
I downloaded a bunch of software last night so I can play with the rig I have. W. F.

Astro Cam (English): 

Astro Stack Software:

Registax Software:   

On Telescope Collimation:

Images and other stuff

These look like really nice units for a lot less money.

This is the one for the cameras I have
Logitech Inc.:       


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