Expanding Spool Holder Hub

This overly complex spool holder uses a screw mechanism to expand into the hub of the filament roll securing it from the inside. The hub can then be supported with a metal rod (less than 6 mm in diameter) which is, in turn, supported by the inverted forks mounted to the top of the printer. This could also be used with a free standing support if that is preferred.

Supporting the spool from its centre allows for smoother filament delivery, This design eliminates the spool rocking that you somet