Actually good advice with some funny jokes thrown
in for good measure!
We're here both to learn, help others, and have fun. Don't take any of us regulars too seriously, but watch out or you'll soon become one of us!
A/C diagnosis is a skill that also requires proper equipment. Your dilemma could be the receiver/dryer or expansion valve too, and each is too much of a pain to try trial and error. You are especially handicapped without a solid service history.
Your next difficult assignment is to find a square dealer with a fair hourly rate.
PS, actually doing my own cavities has proven to have left me with a rather awkward smile!