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