My Hearthstone Mansfield recessed install dosen't give me convenient access to the top center stone, which is where the manuall suggests placeing a thermometer. I can see the back side of the flue collar pretty well and my Rutland magnetic thermometer likes to sit there as well... would this position be acceptable? I'm thinking of buying another thermometer to put on the center stone and then pulling it out occasionally to compare the two. So far I have only had 2, 2-3 log, 300° F fires and the thermometer seems to read about the if left in either location.