IT ONLY WORKS FOR A1 MINI AT THE MOMENT. If you're willing to use it on a  A1 I'll post a new project

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. I've created an another version which was thinner but I wanted to add a threaded version because in my opinion is more handy.ù

It's the first time I make a thread on a piece so if you have any issue please let me know, it worked out very easily to me.

It's very easy to assemble, you just stick both parts in the spool and screw them together. The full print just takes 50 minute.

I've printed it with eSun pla+ at the following settings: 2 walls, 10% infill.

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