Spool hub for Snapmaker 2.0 (A350/A250/F250/F350/...)

Spool hub and side wheel - keeps the filament spool in place and stable, ensures consistent easy rotation as the printer head moves.

This should be compatible with most if not all Snapmaker printers that have spool arm design as in pictures.

I've also created a filament arm corner mount part, in case you would want to move your filament arm to the inside of enclosure.