I added a cooling air jet directly to extruder gear assembly to prevent softening of PLA filament too soon, PLA is worst case (heat is transferred from motor and extruder hot block) this will hopefully apply to new main board upgrade where stepper motors run at even higher temperatures.
Print this to replace current mount and add the
along with a Vlier spring plunger.
Vlier Plunger 6mm Plastic nose
SMC, KGS04-M5, SUS MALE CONNECTOR, 4mm TUBE X M5