This is a Dial Indicator holder for Cartesio V0.8 (Extruder v3). It will fit Mitutoyo 2046S, 2046SH, 2046S-09, 2046S-15, 2310S-10, 2902S, 2047S metric dial indicators with lug back. FreeCAD file is also available in case you want to change the dimensions for other dial indicators. With the build platform at highest position (Z=0) the dial indicator should be around 5mm (middle of its measurement range) so it can be used to measure deviations on both up and down direction.