Universal Spool Holder for SpannerHands System 1KG Quick Change 608 Bearings

I spend a lot of time on these designs so TIPS are greatly appreciated.

Designed to fit into the Spannerhands https://www.thingiverse.com/thing:2119644 spool holder for easy/fast change outs and inspired by https://www.thingiverse.com/thing:1241566. This is by far my favorite spool holder so I had to add an adjustable spool axle. Due to the cone shape this spool holder will fit multiple size spools up to 1kg. The cones go from 48mm to 58mm. Due to the large coarse threads and clearance yo