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This is one of the reasons I recommend putting the spool holder on the side of the unit. there are a couple of files that give the needed support and angle so your not grinding filament as it's feeding. space may not allow for some so the other option is to print a guide I like the 608zz bearing one to at least minimize the strain on your feed.I use both in conjunction even thoughI have a full metal one on my main and a seemecnc setup on my other.
Angled side spool: https://www.thingiverse.com/thing:3360013 608ZZ Filament guide: https://www.thingiverse.com/thing:3352467

Ender 3 Side Spool Bracket
Ender 3 Filament Guide
by ljbeng