REMIX²: Small Modular Multi-filament Spool

Remix of Cernott's remix of giuliolibrando's modular multi-filament spools. 

This remix reduces the diameter of the spool so an entire spool fits on one plate. The smaller diameter also removes most of the drag on the AMS filament feed. These spools can be stacked into 5.2L / 176oz square cereal containers for efficient storage.

I have also added optional spacer rings so a single loose spool can be quickly loaded onto a Bambu spool for printing. The spacer rings also have fixation holes for filament. If you don't need to disassemble the spool stack, you can divide a spool into 3 with a single print. The rings can be used with the originals spools also.

I did quite a bit of work on the model and the print profile to get the threads and other features to print more reliably. Note that the profile will print over the front purge/calibration area. Just trim off when printing is finished.

The 1/3 width spool holds approximately 100g of filament. I have also included plates with 2/3 width (200g) and full width (300g) versions of the spool for when the smaller size isn't quite big enough. A complete 1/3 width spool consumes approximately 41g of filament.

(A couple of folks figured out that if you print a 1/3 and a 2/3 spool, they can be assembled to make two 1/2 spools).

To stack multiple spools, you need to print two of the small pins from Cernott's original. I would suggest instead loading single spools as you need them by using my spacer rings. The rings have integral pins. The loose pins are quite fiddly, get lost easily and will end up in the mouths of children and pets.