Mini 50mm filament spool, 40, 31 or 22 mm wide

If you buy filament in small quantities and it comes without a spool or no spool worthy of the name, you can print one of these mini spools, so you can either print with the filament without it lingering everywhere, or neatly store it.

I have made several iterations:
1. The original version (9 holes in the flanges) is the most lightweight and is suitable for storing small strands of filament, or to print with flexible filament. It is not very suitable to print with, because the spindle is to