Use this newer model with better fit instead: https://www.printables.com/model/376953-ender-3v2pro-direct-drive-spool-adapter
This is an adapter for stock Ender 3 spool holder. The adapter slides into a 2020 extrusion and uses two M5 screws for mounting the stock part. The mounting surface is angled at 45 degrees.
Supports: Yes (Might print fine without them, but I have never tried it.)
Material: PLA+ or ABS
Layer Height: 0.2
Infill: %50
The author marked this model as their own original creation.