This is an improved version of my other design https://www.thingiverse.com/thing:1809028
It is now possible to put the filament in the guide when the filament is already loaded to the extruder (1.75mm filament).
Due to shortage of space, I had to put my filament spool slightly diagonal behind my printer, so that my first filament guide caused additional friction.
So I designed a guide with an angle of 30°.
The files include a mirrored version of this model, too.
The clamp fits on anything with 5 mm thickness, in my case the display of my cheap Geeetech Prusa i3 (acrylic frame).