This is a reinforced filament guide for the Ender 3.
The models I could find were all very pretty but would break under a little stress, which does build up in the filament, so I decided to make my own and publish it here.
This part will make sure your filament enters the extruder motor assembly at a nice angle (if your spool is on top of the printer), and will not break under the normal stresses the filament has to put through during a print. It's quite strong, but I doubt it'll support you, so don't be silly.
It's meant to be attached to the aluminium frame of the printer, much like the default spool holder is. Print some screws beforehand or get them somewhere, since the leftover screws aren't enough! This print uses 3.5mm screws.