This is a modded extruder bracket I made with a cable holder and expanded hole for filament input tube to be used for flex materials.
In the process I added a cable holder on the side of it as the printbed on the CR-10 tends to rub against the cable when the printbed moves.
In order to print flexible filaments with this, you take a piece of feeding tube (approx 10mm), stick it in the enlarged hole where the filament goes in, then cut the edge in an angle that best possible fits in between the two wheels driving the filament.
Theres already a bracket model on here with that feature and I used it to start with, but the hole for the tube plug was too big and the threading on the plug didnt grip too well and eventually it started to pop out while I was printing.
This model here is NOT a ripoff, stolen or anything like it, I measured the original part using a vernier caliper, then modelled it using Autodesk Inventor.
As not all printers will print with the exact same measures due to different conditions, I included the source (Inventor part) .ipt-file in the archive so you can edit it in case you need to.