Semi-automatic Z endstop for Anet A8

My inductive sensor broke and wanted to replace it with another one until it would arrive I used the stock z endstop. I also started using a glass bed. after countless manual calibrating I had enough and though about a semi automatic endstop fitting between the carriage and the extrudermotor. it just screws in the 2 screws (rather tiny holes) and friction fits between the carriage it should be added before every G29 and removed after every G29.

you can add G4 Sxx (xx being amount of seconds)