About this 3D model

The printer have own proximity sensor for leveling, but I needed a visual and to check other points on the printing surface.This is a quick design, it allow you to accurately level the hot bed and detect if it is bend on some points. It can't reach all points but it is the safe place where to put the dial indicator as shown on the pictures. Parts needed:2 x M3 screw1 x M5 or M6 screw1 x M5 or M6 nut3 x washers M6 outer diam. 16mm or M6 outer diam. 20mm Note:Please use a low speed and leave the M5 loosen if you are not sure about how to do this operation.