Snowflake — resizable filament spool

This spool is made for filament that is sold in coils. You need to print it two times: top and bottom parts. The filament coil goes between the two parts and then they are fixed with 3-6 bolts. The spool is installed horizontally.

Besides the spool you need 3-6 M6 10mm bolts with nuts and washers to hold the two parts and one central M6 bolt to hold the spool.

If you want to speed up OpenSCAD export, set `$fa` and `$fs` to 1 at the start of the file. My computer generated STL for 3-arm spool in 2.5 minutes.