No need to remove a fairing to do this - just two allen screws on the front bezel and you're there. As for precision I'm not up for using glasses that make things blurry, or hammers that only hammer 8 out of 10 nails, or rifles that fire 2 degrees to the left or a watch that doesn't tell time. You get the idea. For me, it's an electronic device that was designed to tell you the air temperature, and if it doesn't I don't mind investing a bit of effort to get it there.
Oh, and I just remembered that I reported on another thread that I had done some work on it. I installed the Kreuger windshield rattle kit and I came across the thermometer bulb just staring me in the face. Super simple thing to change if one is inclined. In my case, I felt the bulb maybe sucking up some heat from the wiring in the fairing so I moved it down just under the headlight where the air comes up from the fender. We'll see how that goes. If that doesn't work, I don't think I'll bother replacing it it even though it's a simple task. I'm done with it.