@killcrap: thanks ... I estimate, roughly, that I added about 6 oz (180? g), so after 10 years that seems to be in the allowable range. I wait to see if it holds before a celebratory drink.

@bugbyte: I'll take the car out tomorrow and run the a/c, then check the high pressure line (by feel and by infrared thermometer) and post here. I read your posts and think you might have a V-8. FWIW mine is a 3.0.