About This File
I made this to prevent the bowden tube from popping out of the feeder. For some reason on my self-built printer, this usually happens during the print of the first layer (starting with the brim).
Since the tube is pushed out with quite some force, I resorted to this design, which combines the function of the shoehorse clip (to lift the ring fitting) and of a 25mm clamp, which squeezes the bowden tube to hold it firmly in place.
The design is for a 4mm external diameter bowden tube (1.75mm diameter filament).