Revo Nozzle Holder for Prusa MK3S (with color and nozzle size labels)

A minor remix to add embossed (recessed) labels for the colors and nozzle sizes. 

Print settings:

• model upside-down (labels on print bed)
• 0.25mm nozzle 
• 0.15mm layer height
• color change at layer #4 (0.65mm)
• no supports