Willys Top Spool Holder | Refined | Ender 3 V3 CoreXZ

Huge thanks to @exania for the original Willys Top Spool Holder — this remix wouldn’t exist without your great design!

We are reusing the original Creality spool holder that came with your printer. If you’ve misplaced it, you’ll need to find a replacement or reprint a compatible part.
 

Step 1: Mount the Base Holder on the Printer

Print the following parts:

• base.stl
• face.stl
• face_join_pin.stl

Instructions:

1. Tightly fit the base.stl parts around the original Creality spool holder.
2. Insert the face_join_pin.stl into the alignment holes between the face.stl halves. It should fit tightly, but since the assembly may carry the weight of two spools, it’s strongly recommended to glue the pin in place. Allow the glue to dry fully before mounting.
3. Use the holes in base.stl to attach the part to the top of the printer frame with two M3 screws. If you don’t have spare screws, you can reuse the ones from the filament sensor cable attachment.
4. Use the original screws for the Creality spool holder to secure the glued face.stl part to the mounted base.
    

Step 2: Assemble the Spool Holders

Print the following parts:

• holder_A.stl
• holder_B.stl
• holder_screw.stl
• bearing_608.stl x 4
• (optional) bearing_mount.stl ×4 (scale down by 1–2%)

Instructions:

1. Pre-thread them by screwing holder_A and holder_B together once using the holder_screw.stl, then unscrew them.
2. Insert holder_A into the original spool holder’s mounting hole and twist to attach it securely.
3. Screw holder_B back onto holder_A to lock the assembly in place.
4. Insert the 608 bearings into their designated seats inside the holder. You may also use metal 608 bearings instead of the printed ones.

Optional: If you want a tighter bearing fit, insert the bearing_mount.stl parts as well. Scale them down slightly (1–2%) or scale the bearings up by 1% to ensure proper tolerance.

Step 3: Prepare and Mount the Spools

Print the following parts:

• spool_spindle.stl x 2
• spool_spindle_nut.stl x 4

Instructions:

1. Slide a spool_spindle through each filament spool.
2. Secure each end with a spool_spindle_nut to center the spool.
3. Mount the completed spool assemblies onto the holders installed in Step 2.

Step 4: Guide the Filament to the Printer

Print the following parts:

• filament_guide.stl

Instructions:

1. Attach the filament_guide.stl to the original spool holder’s spine.
2. While the printer is turned off, disconnect the filament sensor cable, then press the white clip to release and remove the PTFE tube.
3. Thread filament from the spool through the guide, into the PTFE tube, and down into the hotend.
    

The current version doesn't support a filament sensor, but this will be addressed in the near future.

General Printing Tips:

• Layer height: 0.1 - 0.2 mm
• Walls: 3
• Infill: 60%
• Supports: Not needed
• Glue: Required for the face join pin