Ender 3 V2 Improved Top Filament Guide
thingiverse
This is a remix with additions. https://www.thingiverse.com/thing:3950799 I found the original worked loose after a while and sometimes as the spool shifted the filament would come out of the slot. 1) Increased to102% for tighter fit (you may need to adjust for your printer and filament) 2) Added a clip in insert (my own design) that rotates so filament cannot fall out yet can when you align slots can be removed. 3) Added captive T Slot M4 Nut so can be secured through back of Ender3 V2 Top Channel with 8-10mm M4 bolt (I measured and cut a 20mm bolt to length). You may wish to add a spring washer to stop it vibrating loose. 4) Updated to have an optional insert with no slot. This is safest of all but slightly less convenient.
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