A Creality Ender 3 spool holder is much narrower than the hole in most filament spools. It leads to tangles. Here's a fix.
DIY digital spool scale tells you how much filament is left
Ender 3 Filament Spool Holder - Fully printable upgrade - 3D model by Nutty145 on Thangs
Filament Spool Holder Ender-3 V3 SE by HappyPaddy, Download free STL model
Testing: Rotating spool holder by Creativity from Banggood
Just printed CHEP's rear-mounted spool holder. I like it a lot so far! : r/ ender3
Free 3D file Pincher V2 - The Ender 3 Adjustable Spool Holder Add-On 🪢・3D printing idea to download・Cults
3D Printing Archives
3D Printing Archives
Bluetooth File Transfer Problems From Phone to Ubuntu? A Quick Fix.
Ender 3 Filament Spool Holder Upgrade / Držák filamentu by Tvorim3D, Download free STL model
3D Printable Ender 3 Pro Filament Side Spool Holder - Longer Heavy duty by Bharat Mistry
3D I/O Store - Ender-3 Pro Left Side Spool Holder Kit
➤Rotating Shaft Design: Independent rotating shaft design for low rotation resistance, good rolling stability, less barrel wear and stable filament
Creality Filament Spool Holder Kit, Filament Mount Bracket for 3D Printer Ender 3 V2/S1 Ender3 Pro/Max, Ender 5, Ender 6, CR-6 SE/Max,CR-10 MAX