A remix from thegman fllament guide. I extended some cylinder by 2mm, made some slope around the hole opening that resides near the bearing and extruder gear.

This is to help the filament go in much easier without being stuck on the heat break. Even the original design, would have the filament stuck at heat break upper end.

So far this design doesn't have any issues

Print this with support, then file the surface that had any support to make it smooth and flat so that this filament guide won't get stuck between the gear and bearing upon insertion.