Lou -- I looked for several minutes (here and on OnePocket.org) but didn't find it. I seem to remember someone saying Greg would be attending some future event to see Grady's rule(s) in operation, but that he had already decided to use it/them.
So, possibilities include -- I just didn't look in the right place tonight, it has already been deleted, I misread something, I'm hallucinating, or ....?
You remembered correctly. I too tried to find it and can't. Pretty sure it was on AZ. The person who authored the post was the tournament organizer for said one pocket event with the Grady rule. I think it might have been a senior one pocket event.