Filament Spool for Replicator 5

The Replicator 5 has an enclosed Spool compartment that requires a particular spool fit which cannot be easily formed from plastic pipe.
The Spool here consists of a core as well as sides formed from 4 components each that snap together.
Constructed with OpenSCAD.
[Update 11/14: Spool core is slightly thinner (to run smoothly), properly turned, spool side segments added.]