Very simple nozzle holder, which holds three nozzles. By default has labels for 0.25mm, 0.40mm and 0.60mm nozzles, but can be easily changed using the SCAD file.

Print flat on the bed, no supports required. Print file sliced for 0.60mm nozzle, sliced using PrusaSlicer defaults. But will work as well with other nozzle sizes.