SpaceSpool - A lightweight MasterSpool

This is an expandable 'MasterSpool' style printable spool.

Called the SpaceSpool, the design requirements were as follows:
Must be lightweight
Must be expandable to allow for 1KG refills to be used
Must work with both 1.75 and 2.85 filaments
Must be easy to print with larger nozzles
Must be available for commercial use to allow for adoption by filament refill manufacturers.

Weight:
24g per rim = 48g per x2 rims
29g per half core = 58g per core
Total weight = 106g p