Have us print this for you
PLA from £6 inc. UK delivery on letter-sized prints. We slice, print on a calibrated Creality K2 / Bambu A1, QC and post.
Doesn't hold the filament down but makes sure it aligns with the feed hole as the print head assembly moves vertically.
The top guide in the picture is this one: https://www.thingiverse.com/thing:3223697 printed at 100.5% scale per the comments.
