IT ONLY WORKS FOR A1 MINIS AT THE MOMENT, if you're willing to use it on a A1 I'll post a new version

If you use a cardboard spool with an A1 or A1 mini you'll probably need this.

When I first got my A1 mini my prints kept failing due to the cardboard spool getting stuck with the printer's holder. Looking around I found some models but they were too big and long to print so I decided to create my own: very light and thin so you don't waste material nor time.

It's very easy to assemble, you just press both parts through the spool and they'll just stay together thanks to the 0.6mm tolerance between the two bodies. The full print just takes 50 minutes.

I've printed it with eSun pla+ at the following settings: 1 wall, 10% infill.

Give it a try and let me know what do you think about it!