Innovative and very high accuracy adjustable Endstop for Reprap Prusa and other models

This very simple tiny Thing allows a quick and very precise calibration.

This innovative approach consists in:
- FIXING the endstop once and forever to the printer structure.
- Doing the calibration by means of a small and accurate M2 screw (0.4 mm per turn) mounted on the part that moves towards the endstop.
- Enjoying NO PLAY/slack.

Sample application - Prusa i3 Z-axis endstop (see pictures):
- Z-Endstop fixed to the metal frame.
- Thing holding the M2 screw fixed to the bottom of