In this chapter, you will upgrade the old Y-axis belt tension mechanism with new parts printed from PCCF material.
⬢The latest MK4 units might already include Y-axis parts upgraded to PCCF. If your printer has these, you can skip this chapter.
⬢To verify, take a closer look from the underside of the Y-carriage and inspect the parts:
⬢New Y-axis parts: PCCF has a dull, slightly grayish texture
⬢Old Y-axis parts: PETG is glossy black
Ensure you thoroughly check before skipping. 
