This filament guide keeps the filament feeding at a much more upright angle into the print head. This reduces drag as the printer pulls out filament and also decreases the chances of the filament snapping in the middle of a print.

Will print it on its back with no support.

Updated to add a raft to keep the clip from lifting off of the print bed when printing on its back. Just cut the raft (.3mm) to expose the slot that slips over the printer bracket.