About this 3D model
This is a dial indicator holder for the MakerGear M2. This mounts directly to the small fan pointed at the filament drive. See photos for placement. This makes bed leveling much easier and more precise. We used a Mitutoyo 1 Series 1410S-10 dial indicator. The hole size is 1/4" ( http://ecatalog.mitutoyo.com/Dial-Indicators-Series-1-C1215.aspx).