Cheap & simple Filament Guiding Upgrade for Titan Extruder & Clones - enables flexible Filament

[Update] After abundant testing with flexible and stiff material, I may say: It works, it's easier to insert new filament, no jams with filament loosing the hobbed track, no material breaks if you push to much.

This is only for 1.75. I have a cheap titan extruder clone with a poor filament guidance. Usually it works good, but with much pressure, the filament is leaving the hobbed area. If you have an E3D Titan, that will probably not of interest for you. But still, they share a common weaknes