I split the katana and blade so that you can have the blade and handle different colours.
Print the blade first in the color of your choice.
When slicing the Handle, add a "Color Change" in PrusaSlicer at 180mm just before the hole is closed.
When the printer stops for the filament change, insert the blade and continue the print. Take care to make sure that it's inserted with the tip down.
The author remixed this model.