Ender 3 Automatic Power off

A simple idea for automatic power off on ender 3
Remove filament, cooldown and shut down

Just put on the right side of your x axis

I used a stock screw and a simple light switch

Use with this gcode:
G91 ; Set coordinates to relative
G1 F1800 E-3 ; Retract filament 3 mm to prevent oozing
G1 F3000 Z20 ; Move Z Axis up 20 mm to allow filament ooze freely
G1 F1800 E-100 ; Retract all filament
G1 F1800 E-100 ; Retract all filament
G1 F1800 E-100 ; Retract all filament
G1 F1800 E-100