PolyDryer Bowden Coupler/Nut

I created a coupler in Open SCAD that uses a PC4-M10 fitting with a seat at the end of the coupler for a reverse bowden tube to rest on to prevent the tube from moving further in.

The design is threaded for a matching nut that is also printed. This combination can fit the lid as well as the clear box body holes without modification. 

The SCAD source is available for remixing and improvements. One remixI can think of is making the nut part of something larger, such as a large desiccant tray.