MK3 Spool Clip

None of my filament spools are anywhere near as wide as the spool holder arm that comes on the Prusa i3 MK3 printer. While printing, the spool always works itself out to the unsupported end of the arm, where it becomes very bouncy. So I made this simple clip that snaps onto the arm and prevents the spool from wandering. Most spools can be installed/removed with the clip in place.

Note: The "square" corner should be pointing up and slightly forward when the clip is correctly positioned. The top surface (as printed) faces away from the spool.