A remix of Steve Wagg's Bambu X1/ P1P / P1S Horizontal Side Filament Holder that feeds the filament from the below the spool instead of above it. This makes it easier to route the PTFE tube into a Y splitter without an extreme bend radius.
The PTFE tube wasn't very secure in the holder (identical to the original), so I just tapped the hole and screwed in a PC4-M6 fitting.