Let's clarify a few things first. I’ll ask one question at a time.
Question 1: Could you please provide more details or a reference description for the "Terminator Zapper by Carol Croft"? For example, do you have a schematic, a link, or a description of its functionality and main features? here's a link on that
https://www.croftzappers.com/zapper-directions and this
https://myhealinggarden.net/zappers-and-resources , the problem is i have not found any specific schematics or diagram for it, i just got info of it on these pages