Bowden tube fixing

Occasionally it happens sometimes that the bowden tube comes loose from the pneumatic fitting, probably due to the large pressure of the filament drive and the constant movement of the bowden tube in the fitting.
That's why I designed a small part to fix the bowden tube on the filament drive.
The same system is used in https://www.thingiverse.com/thing:2859900

Tip : Twist one wire of a flexible electrical wire around the bowden tube, for mounting, to obtain a greater grip on the tube.