The feeds are printed with 98A FLEX filament. The absorber under the Z Axis can be made more resistant by adding perimeter layers. I printed all the models with perimeter of 2 and Z axis with 3.
For the MK3S, you don't need to print the Z-Axis absorber.
I used FORMFUTURA Python Flex filament.
The author marked this model as their own original creation.