FredFish

I had an epiphany regarding the multiline input, and updated the script :)
Almost comical in implementation, it fills the missing void by combining both single lines and slash-n’s. 
Several single lines are in fact a multiline input. Just don’t know how to loop the return definition to call more than one line, so it’s currently limited to 20 lines because it’s just repetitive code for each line, and each line can still have multiple slash-n’s (\n) for newlines.
I had ncluded the variable notes to include comments within the g-code for debugging, but set it not none as the default. 

Thanks for all the assistance with new eyes when my lines of code get blurry, moving this to thingiverse. 
ff_InsertGerberAtLayerChange(update).zip

cura 5.4 beta has updates, and GregValiant has posted a post process script to include the last tool change, so no need to add  {machine_extruder_end_code, Extruder_nr} to the printer end gcode 
 
Thanks GregValiant, good work

for now the M221 seems to work well when i add it to the start and stop g-codes of the ink pen extruder T1, Cura is ok with the filament cool down and resets the temperature back and waits for it when switching back to using the T0 extruder, so I am happy with this work around.
 
Thanks for your help.