Modular Printable Spool

Here's a filament spool that can be easily dismantled and assembled in a variety of sizes, without the use of glue or any plastic welding.

There are holes provided to secure the assembly with M4 or M3 bolts for the ends, and any small wedge/pin to keep the spars clamped into each end, but you should be able to keep this whole thing together with just a bit of string if you really want.

This spool is mainly designed to ride on my Mendel-top spool holder:
http://www.thingiverse.com/thing:8290
However, it should work fine in any other setup with a horizontal axle. You should probably only use it on its side if you have glued/welded the segments together on the bottom.