Silvering, I would contact Ray Parkhurst through the link I posted. I got most of the setup from him. I tell you a set up to start with though is the Plugable USB camera. Its what I started with.
I use Canon EOS Utility software for the tethered function. Digital Photo Professional for resizing, (both have edit functions as well though I rarely use it except to get a truer color), and Helicon Focus for image stacking when using the microscope lense.
Neat for sure. I love overstrikes and overdates. This one has it all. This type is not that uncommon to find on ebay but this was a good example that photographed well.