The model this is based on: Bambu X1 bowden tube reinforcement / strain relief

It is the only one of these I like because it's removable without destroying it! But! I still got occasional filament pullback issues

• Simple extension of 4mm
• Slight indentation and bevel to make the ptfe tube rotate easier/less wear

Not had a pullback issue in months, one of my x1cs recently printed a 1026 filament change project over 29 hours without a hiccup