I made this for my Kobra 2 Max, although it'd work with any printer that uses the same style of runout sensor.
I hated the position of the spool holder on the Kobra 2 Max. A few times the filament broke on me because of how everything is positioned. I decided to make this, an adapter so I could connect a Bowden tube up to the runout sensor. This way I can feed my filament from a dry box, and get rid of that awful stock spool holder.
I'm sure someone has made this somewhere. The ones I found weren't so great though, so rather than keep looking, I put this together quickly. enjoy!
The author marked this model as their own original creation.