After receiving a lot of feedback, I decided to design a dedicated CFS filament buffer slot specifically for the exhaust system I created for the Norco T riser.

This add-on is only compatible with my custom exhaust setup for the Norco T riser. It allows the filament buffer to feed filament smoothly while maintaining a clean sweep bend, ensuring the tube curvature stays optimal and kink-free.

You can also use the same tube joiner included with the CFS upgrade kit, making installation even easier

What You Need:

1x M3 x 4 x 4.5 Screw Insert

1x M3 x 16mm Screw

2x Washers

Super Glue

Note: You’ll also need the custom Exhaust System for the Norco T Riser and the CFS Upgrade Kit I designed (for the filament buffer and tube joiner).

Use these STL if you haven't already to use the buffer slot. This is all you need for your Ultimate K1 Max

NorcoT Riser : https://www.printables.com/model/623798-norcot-creality-k1-max-glass-lid-raiser-with-slidi

Ultimate Exhaust system for K1 Max for NorcoT lid riser by TonyF : https://www.printables.com/model/1217128-ultimate-exhaust-system-for-k1-max-for-norcot-lid

CFS Riser for K1 Max CFS upgrade kit for NorcoT lid riser by TonyF and Gabe_Nick : https://www.printables.com/model/1251590-cfs-riser-for-k1-max-cfs-upgrade-kit-for-norcot-li

No glue or tape is required to install the buffer into the slot—it’s designed for a snug, secure fit right out of the printer.

To ensure everything works smoothly, I printed a Benchy positioned at the front-left corner of the printer bed—the area most likely to cause a tube kink due to the routing. This test confirmed that the filament feeds properly without any snagging or issues, even at the most extreme angles.

Note: If you’re concerned about the filament buffer slipping out, you can use two small wood screws to secure it in place using the pre-made holes in the buffer.

I personally didn’t need to screw mine in, as the fit was already firm—but this can vary depending on your print quality and tolerances.

If you like this design and find it helpful, I’d really appreciate a boost or a coffee to keep the ideas flowing! ☕️

CFS Upgrade kit Filament Buffer Slot (Exhaust sys. Norco T)

0.2mm layer, 2 walls, 15% infill