Filament clip
thingiverse
The original filament clip designed for 1.75mm filament (https://www.thingiverse.com/thing:12516) performed well but had a very loose fit on my filament spool. I modified it by adding a small bump to the flat side, allowing it to securely grip thinner-walled spools. The leg on this side was shortened to accommodate new filament spools.
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