Just wanted to report that two months later the system is still working flawlessly and still holds a charge. Thank god!

It's getting a bit cooler here in Florida, and if it's less that 80* outside I'm getting 18* out of the center vents. Yes, you read that correctly. It still struggles above 90* ambient, but I think tinting will help. It's an old system so I'm not overly picky.

If this isn't a reason to invest in your AC system and use proper R12, I don't know what is.