Post Processing Script to pause then move Z axis

[stevvie 0]

I can add G4 300 (wait 5minutes for the hotend to cool down)

Then G0 Z250 (move Z axis to top of printer) to my end Gcode.

I do this as it  activates a micro switch to cut power to the printer which is positioned at the top of the printer.

I was hoping somebody would help me put this into a post processing script so that i don't have to remember to edit my end gcode, As if its a script then the tool icon will appear near the send to printer after slicing, as I have such a lousy memory.

PS this need to be done when the print has finished.

Thanks

Edited January 16, 2019 by stevvie