Bed Level Tuning Kit (Prusa & Clones)

This is a kit for leveling the bed of Prusa MK2/MK3 and similar when the bed warp is too severe for the automatic calibration to handle it properly. The included tweezers is an absolute time saver, in fact I found it next to impossible to squeeze the stack of washers+spacer under the MK3 bed which is full of magnets. How to use: you add a couple M3 **spring** washers under the bed spacers (more where needed but keep in mind each washer is 0.5-0.8mm). You then measure and adjust as needed until the mechanical warp reduces. In my case I got a 10x reduction in warp (from 600 microns to about 50 - couldn't get further because the remaining warp is between the screws and is S-shaped). The repeatability of the dial mount seems to be around 20 microns (0.001") when moving along X axis and 3 microns when moving Y axis (0.0001"), note that the copper traces and the white paint also have thickness that influences the reading. The dial indicator mounts to the printed part using an M6 20mm screw (or a 1/4"-20 3/4"). The printed part clips on 8mm rods, 45mm apart - which is typical for Prusa MK2, MK3, etc.