Summary

This print is a measurement setup to accurately measure the diameter of an extruded filament using two 22*7mm ball bearings and a dial indicator. Based on the design offered by newcrz (https://www.thingiverse.com/thing:4835232) this version includes an movable panel in the front to be able to insert the filament without passing trough any hole. The panel is maintained closed buy two small clips on the side of the main box.
Holes are designed to use M5 and M3 screws with no insert and no nuts (self threading holes).

You can find an illustration video at:
https://www.youtube.com/watch?v=BrRsHXqmoSk