Regular calipers measure to 0.001" meaning their accuracy is to the nearest 0.001, so +/- 0.0005"
Anything you add to the caliper has to be to that same standard or it decreases the accuracy and repeatability of the measurement.
SO, if the "printed part" fits to a consistent 0.0005" it is usable. If not, its just extra junk that can distort the measurement.
Depending on what you are doing, this might matter...