Okay, so I'm still having fun with my new Creality CR-6 SE. Machine is fine, software is a mess. My Ender 3 Pro has a lovely drop down list of nozzle sizes. On the CR-6, that list is empty. I am assuming that somewhere in the 20 or so definition files, there is an incorrect reference to a nozzle definition file.
Where does Cura pull the nozzle size list from?