
There is a dowel pin inside the hot block. Try not to let it fall out of the hot block.
Step 3: Use the 2.5 mm hex key to remove the two screws from the SuperPINDA sensor holder. Set the holder aside.
Step 4: Insert the Copperhead Hotend into the heat sink as shown. Use the 1.5 mm hex key to tighten the heat sink set screws circled in green.
Step 5: Use the foam swab to thoroughly coat the heater cartridge and the temperature sensor cartridge with Boron Nitride Paste. Clean any excess paste.
Step 6: Fully insert the temperature sensor into the top hole and the heater cartridge into the bottom hole.
Step 7: Reinsert the retaining screw into the hot block. Use the 2.0 mm hex key to tighten it.
Step 8: Replace the SuperPINDA sensor holder and use the 2.5 mm hex key to tighten the screws circled in green.
Step 9: Place the silicone boot onto the hot block. Make sure it is secured.
Step 10: PID tune the hotend and adjust the z-offset before printing.

The Prusa Mini's firmware does
not store new PID values in EEPROM. Once you determine what the PID values should be after running the
M303 command, add those values to your start GCODE with the
M301 command. This ensures they are set each time you start a print.
This is the end of the Prusa Mini Upgrade Kit Installation Instructions.