Ultimaker 2 Spool

I have tried to use other designs of Spools/Reels (call them what you will), but found them to be rather lacking. So I thought I would design my own. It stops the filament from getting caught to "arms' or "spokes". It is specifically designed to fit the standard "as supplied" filament holder as I don't have a problem with this.

To print I use the standard 0.4mm extruding nozzle.
Layer height - 0.075mm
Shell thickness - 0.8mm
Bottom/Top Thickness - 0.6mm
Print Speed 50mm/s