I reinforced the standard holder because it was often too weak.
It has stronger sides for holding the heater block and more material in certain areas.
It fits the MK4S printer with a silicone sock installed and E3D nozzle
I recommend printing with ABS/ASA/PA or another temperature-resistant filament.
Recomendet print settings :
minimum 4 perimeters for 0.4mm nozzle
minimum 40% infil
The author remixed this model.
i reinforced standart replacment tool becouse it was to weak.