i3 MK3 to MK3S+ Upgrade Printable parts

All printable parts for upgrading your MK3 to MK3S+ sorted by upgrade manual chapters.

Attention, y-rod-holder is present 4 times in the printer. If you plan to print the whole upgrade, print this part 4x. Look for a number in the brackets in the file description.
the fan-shroud part isn´t included in the pre-sliced files because it needs to be printed from a high-temp resistant material.

The Other folder includes some optional upgrades to the latest part version if you have the older ones installed on your printer.

Print instructions

PrusaSlicer's default PETG 0.2mm presets.

For fan-shroud part, please use Prusament ASA / PC-Blend with default settings and 5mm brim. If you still have issues with bed adhesion, keep lowering the print speed until the part prints out successfully.  
The fan-shroud STL file includes an inner support rim that needs to be removed after printing. It can be easily removed with needle-nose pliers, a knife, or flush cutters together with the brim. Otherwise, it will block most of the air from coming out. See the printed part post processing article to see what the fan-shroud should look like after removing the inner support. 
ASA, PC Blend, PA or even ABS, as well as other high-temperature materials are only suitable for experienced users, and being from different manufacturers, properties may vary greatly.
PLA or PET-G is a no-go for fan-shroud because of its low temperature resistance. 

We recommend using black filament to print all MK3S+ extruder parts. If you want different colour, you can use it, but the FS-lever part should be definitely dark (black) and the other parts surrounding the IR-Sensor as well. In case you use any lighter colour for the FS-lever it might not trigger the sensor.