Ender-3 Z axis calibrator

This is a simple tool to calibrate z-axis.
It is composed by two identical objects (you have to print the object two times) that replace the original z axis micro-switch holder.
If you discover that your plate is calibrate but it is too near or far to the nozzle you can move all plate wheels but you risk the lose the calibration, a different solution is to move the z-axis switch. You can measure the z-error moving the nozzle by display menu, when you find the right height you can move the swit