Kaweco Sport Pocket Clip

I got this pen for my birthday from my lovely wife. I use it every day, but in my office environment it rolls away quickly! I'm used to clipping my fountain pens to my shirt, so I made this. 

The hole is 13mm across, and the ring fits my AL Sport just snugly. Adding the clip puts some more pressure on so it should not slip off. If you find it too tight when adding the clip, sand or file a bit from the clip where it interfaces with the ring, as show in photo. The clip itself is a little wider at the end of the clip so it will put some pressure on the shirt fabric and not slip off. You will need to reduce your filament's extrusion multiplier if the ring doesn't slip on with minimal effort. 

Instructions for printing are included below, and seam placement instructions are shown in photos…