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PS Superdave, I would be glade to send you the coins (At my expense both ways for your review)!
I'd love to but frankly, I'm not going to be able to do a whole lot more for you than I already have. I lack the optics to do the study properly. If you'd like them imaged, I'd be happy to; I can photograph them with sufficient accuracy to satisfy insurance requirements, but not to attribute.
To answer your specific questions: Heritage membership is free. Just register. No guarantees your wallet will remain safe once you see how much is offered there.

It will take a decent microscope to get images of sufficient accuracy to properly attribute
VAM's. CCF member b17commander uses a Brunel microscope to achieve truly excellent results; his MX3 model runs about US$200 plus the attachment for a camera (should you wish). That is about as inexpensive as it gets for a 'scope of any real quality - one is at the very top of my toy list and will be my next investment.
Keep one thing in mind, though. The coins you've presented here are nice, but do not, and likely never will, have any additional value because of their variety. This investment on your part, both in time and in money, will probably only be an intellectual exercise in the majority of cases. Only you can decide if this investment is worth it.