Prusa i3 Plus bed levelling sensor holder

Bed levelling sensor holder for Prusa i3 plus extruder. Sensor used LJC18A3-H-Z/BX from http://www.aliexpress.com/item/High-Quality-LJC18A3-H-Z-BX-Approach-Sensor-Cylindrical-Capacitive-Proximity-Switch-NPN-6-36V/32602466762.html
It is capacitive sensor which doesn't need conductive bed. It works perfectly also only with glass bed. Installation instructions are everywhere on google or youtube.