This is my take on a (reverse?) Bowden tube adaptor for the Creality Sprite so I can use the Big Tree Tech BTT Filament runout sensor 2.0. It is intended to use an M6 threaded tube fitting. I printed it easily with minimal tree type supports. The picture shows an older revision that lacks the clearance I added to allow for tension adjustment without the need to remove the part.
The author marked this model as their own original creation.