This is a set of mounts to add support rods to the gantry of the Ender 3 V3 (Core XZ. The support rods are designed to reduce the amount of wobble in the gantry, which can improve print quality. It uses 3/8" threaded rods OR M10 threaded rods. 

EDIT: Added new files for M10 rod support. Thank you to spartak4802 for help testing metric files. 

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BOM

**Please Note:** *The heatshrink is **NOT** optional unless you move your filament sensor somewhere else. Those wires will be torn up by the threaded rod otherwise. Tape it. Wrap it. Do something but do not leave it bare. You have been warned.*
 

Aliexpress Heatshrink:

https://s.click.aliexpress.com/e/_DFPSOzV

Assembly Instructions
 

1. Attach base mounts. These snap onto the rubber legs under the printer. Pinch the legs together if the fit is too tight. Its intended to be a snug fit.
    
2. Cut and place heatshrink tube on threaded rods about 1 inch from the top and bottom.
    
3. Insert nuts into the base mounts. There is a slot to insert the nut on the side. Thread the rods into the base mounts.
    
4. For top of the rods, first thread a nut, then a washer, then attach the top mount to the rod - BEFORE attaching to the printer.
    
5. With the rods attached to the top mount, carefully angle the mount to slide the back notches into position on your printer. Once the notches are in place, apply some pressure to the front to snap the mount into place.
    
6. Add 2 washers to the top and then a cap nut. Tighten nuts BY HAND. These printers have a pretty square gantry from factory so be careful to not mess that up. It needs to be tight enough to hold everything in place, but not tight enough to push the frame forward.
    
7. Screw in your M3*8 screws to the top mounts.
    
8. Enjoy!

Printing Details

- No supports on top mounts. Lots of support on base mounts.

- Lots of walls

- 15% infill minimum

- PLA works fine. Any material should work. There is no heat or heavy strain on any of the parts.

Disclaimer

I am not responsible for any damage to your printer. This is a modification and should be treated as such. If you are not comfortable with this, please do not attempt it. I have tested this on my printer and it works great. If you break something, thats on you.