I started working on this 10 years ago when I got the $300 monorpice 3D printer that had just come out. It kind of sucked, so I printed a few things then it sat on the shelf before I just gave it away.
Fast forward 10 years and I was given an old Ultimaker 2. It’s finicky, but it mostly works. With my new basement shop space nearing completion, I figured I’d give these another go.
So far I’ve made 2 different sizes – one a ‘standard'(?) for many of the cable spools I have, and a bigger one for a magnet wire spool.


Unfortunately I can’t find the source of the original DIN clip & latch profile to give proper credit, but there appear to be a number of remixes on Thingiverse.
Anyway, here’s the file if it’s useful to anyone, licensed under my ‘Don’t be a cunt’ license, which I’ve yet to write.