I'm probably never going to live long enough to follow or even backtrack on your long , long journey. Apparently it's longer than a coronation street re run.
For years I chain smoked, 40 plus a day for over 40 years.
Off and on vaper for the last 5 plus years, so basically I was still a smoker.
Best spell so far, 13 months without a cigarette. Relapse, back to the vicious circle, but you know all that anyway.
Look at your vaping style, trust and listen to experienced guys. Experiment, plan ahead, don't count the minutes.
Find a diversion every time smoking enters the thought process, walk, cycle, Tommy tank etc.
Something will work, go find that something. For me it was discovering a vaping style that filled the void, a imaginary void I hasten to add.
Good luck.