modify end g-code

[danielvaneygen 0]

I would like to add following end g-code to all my g-code files automatically. This code should allow my creality ender-3 pro to switch itself off after the nozzle is cooled to 40 deg. This is done with some modifications to the machine such as a switch, relay and microswitch.  See https://www.thingiverse.com/thing:3744808

Where can I add this end code?

In Preferences - Ender-3 - Machine settings the tab for End G-code is empty and can not be modified.

Thank you

Daniel

 

G90 ; set coordinates to absolute
G1 X0 Y210 F1000 ; Move Heat Bed to the front for easy print removal
M109 R40; Wait for the hotend to cool down to 40C
G1 Y220 ; Move Heat Bed to Y=220 to turn the printer off