Best CR-10/Ender-3 MK8/MK10 Extruder for any (including flex) material

thingiverse

So far the best MK10/MK8 extruder bracket is this one. It can handle 40D flex at speeds of 60mm/s or more without any issues. The bracket also has a spring tension regulation system that makes it easy to adjust. I highly recommend printing with slight over extrusion, as it significantly improves part strength. To ensure the PTFE coupler stays in place, you may need to use some teflon tape, although this isn't necessary if you're using an over extruded print and have proper extruder calibration. Please do not print the "without_drilling" version of this bracket, as the filament path is not smooth. Instead, follow the post-printing instructions that are included. For the lever on the bracket, I recommend using the standard one that comes with it. If yours is broken, you can easily replace it with a similar one from https://www.thingiverse.com/thing:2492903. I use a 1.0V Vref setting and haven't experienced any jamming issues so far. However, if you do encounter problems, simply increase your Vref by adjusting the motherboard potentiometer. Remember to carefully follow the post-printing instructions that are provided with this bracket.