Scalar - UFO Spool Holder

Here is an alternative to the already existing Scalar spool holder.

This model is using a M8 threaded rod as central rotation axis.
It's also using 2 UFO (cone) shape like parts that will stabilize your spool.
Inside the UFO, cone shaped parts you will need 1 608ZZ bearing that will couple the static M8 threaded rod with the moving spool. The bearings should snap inside properly and depending on your printer resolution they can even stay in place without using the cover parts.

You will a