Very glad to hear you are on the mend, Pete.
I don't think the desire ever entirely leaves an ex-smoker. My late mother came from Preston (UK), where a festival called the Preston Guild takes place once every 20 years. 2012 was a Guild year. After the 1952 event, Mother gave up, declaring that she wouldn't smoke again until next Preston Guild. In 1972, I caught sight of a packet of cigs in her handbag. I didn't mention it, and though she may have secretly tried one for old times' sake, she didn't take the habit up again.
Next Preston Guild will be 2032, if any smokers on here are young enough to make a similar resolution.
Andy