Spoolholder - Shelfholder

My 3D printers are arranged under a shelf, so I have created a hollder for my filament.
It's a pretty neat way to hold the filament for printing, the standard holders for almost every printer has in my opinion some flaw (bad location, bad filament feed etc.)
The holder is creaded for a 16mm shelf, feel free to edit it for your sheld, the 3D files are included (Sketchup)