Filament guide
thingiverse
I was looking for a design that would minimize resistance. It should seamlessly integrate with this guide: https://www.thingiverse.com/thing:979847, courtesy of grezmel. Make sure to employ supports.
Download Model from thingiverse
With this file you will be able to print Filament guide with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Filament guide.