So on my first 2 chimney installs I had the good fortune of hitting the roof framing just right. Now on my current install I drilled a pilot hole in the center of my chimney location. Then when I looked in the attic it is only 3 inches off of the ceiling rafter. So my 2 options are either head off the ceiling rafter or move the chimney location 3 inches and have an offset after the chimney adapter. I am leaning toward do the reframing and heading off the ceiling rafter to make the install cleaner and not effect my draft with an offset. Any thoughts?