Pat, I was inspired by your book to buy a human skull replica. I tried replicating the photos. While the placement of the shot glass and dime aren't right, I used the tool image overlay utility to compare it to the F8 photo, and the elliptical shape of the dime is a perfect match for the drainage hole. The shot glass also fits very well. The virtual "EOP wound" is a 15x6mm piece of blue tape.
Imgur album links:
https://imgur.com/a/WvCtp
https://imgur.com/a/qeGPd
If I can find a way to connect the live feed from my digital camera's display to my computer monitor, I can use the image overlay utility to perhaps create a 100% perfect match for the open-cranium photographs.
Is there some kind of journal where someone could one day publish a peer-reviewed article proving that the backyard photographs were most likely taken with a tripod?