Pete, thanks for your story. It brought back memories. I remember that when they told us the age of understanding, it ended up being someone born around 1900, so the math was always easy for me:) Later, it got lowered and lowered to the point that one simply had to be alive in 1914. That doesn't seem to have alleviated their troubles.
Neonmadman, I don't remember you from before, so (probably really late) welcome! I appreciated the PDFs and have saved this thread and them for future reference.