This is a remix of tim_sweden's filament feeder for the 2016 edition of the FlashForge Creator Pro. It offsets the filament guide tubes so the filament unwinds more uniformly from the spools.
This remix has a more hollow design to reduce the amount of material needed for printing it. It also has tapered holes for easier insertion of both the tubes and filament.

Another change is that the holes do not allow the tubes to go all the way through. Not only does this make it trivial to align the tubes, it also helps if you have nasty poorly wrapped filament spools that are tangled to such a degree that the extruders pull hard on the filament. If that happens, there is a downward pulling force on the tubes, and there would be an increased risk that the filament gets completely tangled if the tubes would be pulled below the feeder.

I recommend mounting the feeder in the topmost clamps, especially if you use filament filters like on the photo. The more room the filament has to unwrap from the spools, the lower the risk of it getting tangled up.

(The filament filters shown in the photo are thing 492067)

Update 2016/10/02: I added a ‘v2’ model which has slightly thinner mounting rods and should be easier to mount into the clamps without risk of breaking. You should try this v2 model first, unless you know your printer has a habit of printing things slightly thinner than they should be, or you are printing in ABS that shrinks a lot.

Update 2017/02/12: Added the “withStops” versions. These also have the FlashForge logo the right side up :)

Update 2019/03/29: Dropped the obsolete and potentially dangerous versions that allowed the tubes to go all the way through.