Lloyd, best of luck on the surgery.
Good time to quit the ciggs. The first time I quit (about 30yrs ago), was while I was in the hospital recovering from an appendectomy. You'll feel a lot better, and you will actually shoot better. By the way, I quit about 4 times during my 61 years -- each time for at least a year, and up to 10 yrs. Once you quit, don't ever start again, no even "just one".
Again, hope the surgery works out, nothing worse than a bad back.
Paul