Tilted Filament Guide

I found that the original arm had a tendency (with some stiff filaments) to allow loose coils to go over the side of the spool and tangle up.  By pointing the arm downwards, this should keep the filament within the sides of the spool.

I also place some spools (with too-narrow centres) on rollers at the level of the desk.  Pointing the filament down also helps with these.

This is a modified version of the PC4-M10 version, and requires a corresponding connector.

Because of the tilt, the screw thread for the connector will probably get some supports added. This shouldn't be a problem is you print with low filament heights, added walls and and strong settings.

The rest of the files, and the printing instructions, should come from the original design by BC Designs …

https://www.printables.com/model/421739-bambu-x1c-p1s-side-mount-spool-holder-v2

The head of the filament guide arm (with the PC4-M10 connector) has been twisted downwards by 20 degrees.  It has also been lengthened to move it farther over the spool.