@MaxS I have the same question.

@rjamison I checked my filament sensor, and it is true that when you take the top off the enclosure the board moves around a bit, as it is sitting freely on two posts projecting out of the bottom half of the enclosure. However, there are two bosses projecting out of the upper half of the enclosure that press down on the board keep it from moving very much when the enclosure is screwed together. On my unit it certainly does not move around enough to cause a false filament reading.

@MaxS I have the same question.