Hey, MrDevious. Sorry to hear you have to have surgery on Friday, but I'm glad you'll be working to keep your lungs clear until that's over. It really does help, both during and after surgery to have smoke-free, unirritated lungs. During surgery, clear lungs help you to use less anesthesia and use it more efficiently. And after the surgery's over, smoke-free lungs help keep you from getting pneumonia, which is easy to pick up in a hospital (and notoriously hard to get rid of afterwards), particularly if you've had thoracic (chest) or abdominal surgery and are having a hard time taking deep breaths because of post-operative pain. Good luck on Friday, and definitely let us know how you did afterwards. I'll be sending good thoughts!