No thanks. But thanks for asking for the umpteenth time.

The site (although being promoted by shameless spamming) has decent
information decently organized, but the products it promotes for DIY service
of R-134a systems get my "you'll be sorrryyy!" warning. My advice on R-134a
systems is still, "if you doubt the charge is correct take it to a
professional." It's just too easy to make matters worse... a lot worse.

Mike