LOL I never provided an update.
2nd opinion. The 2nd tech concluded NO identifiable leak. He filled the refrigerant no charge. He said it was essentially gone. He said a leak is not 100% excluded but states it doesn't hurt to do a trial and if the pressure drops off rapidly then I may need a replacement. He also states if there was a leak it may have taken years. No one really knows.
Well, I sold the house in January of this year. The a/c, after the 2nd opinion, held perfectly fine and never stopped cooling that summer and the following summer. Probably scammed by the 1st tech. I complained but the owner backed his tech. Not surprised.