Beethefirst 1kg internal spool holder (Ziro spools)

Beethefirst internal spool holder attachment for Ziro 1kg spools. Uses existing stock magnetised spool pin and holder, which should click into place.

Was growing tired of replacing Beeverycreative's small and relatively expensive filaments. Furthermore, I wanted to keep the spool neat and internal. So, I designed this.

I have specifically specified Ziro spools as they have centre cutaway that fits nicely over the existing spool holder base. The design is quite tight and sits flush with t