ender3 extruder fitting gap

There's a gap inside the extruder and the PC4-M6 fitting which is annoying to deal with when you want to feed a new filament through. If the new filament isn't perfectly straight it gets caught in the gap and you can't get it to feed through without trial and error. This piece fits in before the you screw the PC4-M6 and acts as a filler for that gap.

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/iuUkHAmOGwk