@boelle:
nice link
i would glue the thermistor to the underside thou as it would be hotter than the top of the chip
has there ever been made FLIR pictures of the duet in action?
I stuck it to the top because when the fan comes on, I blow cold air on the underside. If the thermistor were stuck to the underside, it would sense that cold air and turn the fan off prematurely.