A replacement for the metal U-bracket with a M4 screw. The metal one already destroyed two rotational bearings by abrasion. See photo. Now the plastic pulley will wear until a stable state/position is reached. A M4 thread is included making assembly easier. Print with 100% infill for maximum strength.
In my case (Geeetech acrylic) this is a obligatory replacement.
Supports are included. Drill a 4mm hole through the thin walls on the side.