Ender 3 Neo V2 ball bearing spool holder

This 3D model intentionally created for my Ender 3 Neo V2 printer to reduce the retraction force and stress that is coming from the spool. In certain conditions, when the spool not having enough slippery contact between spool frame and spool holder, the filament could not be extruded easily. Also could cause stress and force on Z axis. With this custom mod you can apply a fix. 

All you need to do is the following: 

1. Print the 3 elements. Most preferrably, one by one. But, optionally, you can do it at once by printing out the "CE3V2-spool-holder.stl" only. 
2. Grab an M8 x 95 bolt and 6pcs of M8 nut 
3. Grab 2pcs of 608-2RS ball bearings (22mm outer, 8mm inner diameter, 7mm height) 
4. Attach the first ball bearing to the bolt and fix it's position with one nut. 
5. Attach another nut and second bal bearing from approx 22mm far from the beginning of the bolt.Then fix it's position with another nut 
6. Attach two additional nuts to approx 20mm from the beginning of the bolt. Tighten the two nuts by turning them against each-other to fix their position.
7. Measure everything TWICE! 
8. Heat up the last nut and push it into the endcap nut holder. Be careful! Do not heat up the nut too much, otherwise you will melt the printed model... 
9. Put the bolt and ball bearings into the tube from the opened side (tighter side). You can see how it should looks like on the attached photo. 
10. Attach the washer to the bolt. 
11. Attach the assembled holder to the original frame and tighten the screw. Additionally, a screw driver (philips or torx depends on what bolt you have) might be needed. 

Enjoy! :)