I saw K2 filament clip in a youtube short today, and after seeing the demo, it looked unpractical due to its shape.
So I made something more compact that works exactly the same, and suits my preferences.
It can also stay on the filament while printing, so you never loose it or waste time looking for it.
Default size for 1.75mm filament
Upscale to 171% for 3.00mm
Upscale to 162% for 2.85mm
The author remixed this model.
2023.11.05 - Added double ended variant