Here at LulzBot headquarters we use a lot of plastic filament so we created a spooling station to transfer the plastic filament onto a reel. We use a custom modified extension cord holder in addition to a few printed parts.
We use the m8 option.
Modify your Extension Cord Holder
Use the following images to modify the cord holder.
Load the filament
Use the drill adapter to drive the cord reel and start coiling your filament. It's recommended to secure the reel holder and the filament spool.
Splitting Reeled Plastic Filament
You can use 2 of these 2 inch reel hubs to mount a reel of filament.