I just finished replacing the hot end on my Creality K1 and my first prints are dimensionally undersize, in the XY directions, by more than 1%. I can only think that it has something to do with Creality Print 5.1, which I started using after changing the hot end. I have been searching the web for instructions on how to calibrate the XY steps. I’ll try to go back to Creality Print 5 and compare the dimensional accuracy: