have a creality K2 plus and have been printing for 10 months with it, have had some problems and replaced parts thru creality warranty. the problem now is with the 2 CFS I have, I get a FO2845 ERROR when trying to print using the CFS, but if I print single filament with out using CFS it will print fine. I have replace the filament splitter on the CFS and tried each one separately with no luck. when it started the print was ok till it got to about 75% and that's when the CFS stopped, they feed to the hot end that's where the error happens every time.