Hello,
I am using cura to control a Creality CR10s4 and have used a Creality CRX profile for the dual head capability. I have designed a dual extruder system for the machine with a nozzle cleaning brush. I wrote custom extruder start gcode to switch tools and clean the nozzle before proceeding. I saved the project and tested. It did not behave exactly like I wanted so when I went back to modify the start code it is now blank. The start gcode for both extruders has been deleted. Any help would be greatly appreciated.