Well, I got my new sensor the other day and soldered up the one I needed in the kitchen this morning. I also made a temporary mount for the sensor under the cabinet next to my fridge. This keeps the sensor out of the path of the warm air blowing in and should give an accurate 'room' temperature.
Now, I just need a sunny day where my attic gets up to temp to try it out. Its been so gloomy lately. Today is very sunny so far, but its really windy. We'll see if it gets up to temp or not.