Ken, I may need to see if I can audit your cavern course. I have a PADI Cavern card from 1993 from some instructor named Jarrod Jablonski...wonder if it is any good?
That's the guy that told you walking doubles down to Jug Hole was acceptable?
Here's an interesting story for you, a guy took advanced from me 3 years ago. He had previously been certified as an OW diver through the YMCA at UF back in the 90s, but had stopped diving for several years and was getting back into it. His card was from JJ.