my xcalibrator2 is coming in a couple of and i forgot to tell them i had a 180 degree thermostat.do i need to change the fan settings to come on earlier?can i change the settings without messing up the tune they programmed in?i could always put the 195 degree back in if its much trouble.i don't have the xcalibrator yet so i don't know the changes i'm able to make without having the manual.can anyone update me on this?