Multiple Modular Screw Spool - Printable

This is a modular spool for 3D printing filament which can hold multiple filaments in the same spool. If you're like me, you have several samples lying around without spool; this is an attempt at storing them in an orderly fashion.

The model consists of three logical parts, the *screw*, the *nut*, and the *separator* (by which I mean the plate where you attach the endings of the filament. Is there a technical term for this?). Combining these parts gives modular segments that can be screwed onto a main screw axis to create separate compartments for the filament. It's easy to customize the design to make your own spool; I provide two configurations for 1 and 3 compartments, on a 75mm and 93mm spool.

The separator has pre-made holes to accommodate the filament; two close to the nut external cylinder and eight on the most external ring. The holes are made in the two possible winding directions of the filament, to avoid bending it too much, and can be used to "sew" the filament throug