Hey folks, I'm thinking of buying a guage set for checking A/C. I won't be using it for a shop just my own stuff so I won't need the most heavy duty fancy (aka expensive) thing out there. I may as well get one that does R12, R22, and R134a. Does R22 and R12 use the same fitting? I'm only thinking of R22 capability in case I should ever have a problem with my home central air unit. Can anyone recommend a set?