When you wrote 'regassed' I took that to mean you had filled it up not just topped it up. The R134a in your link is pretty cheap though as it it is a 425gm can. I shall have to order a can when I get back to France as I want to use STP Super Seal on it. My system is either porous or has a small leak as I need to get the A/C refilled every couple of years. It's a very small leak & the system otherwise works very well.At no point did I say the system was empty. I filled it from empty using cans 13 years ago and it has worked fine until recently although efficiency had been dropping off for a while. I just re-filled it to the correct pressure which took less than one can and it is working very well again.