I just posted this over on Thingiverse
This is a modification for the spool holder on a Lulzbot Mini. I started checking them out when I had a bit of a feed issue with the standard holder. Of course it turns out the feed issue was caused by the tail of the filament sticking too far out the inside of the spool and hanging up the rotation on the standard holder. It did make a pretty loud CLUMP when it finally pulled over (check your spools before you load them). So this is really the answer to a question that nobody asked. The standard holder works fine. It did however provide a good excuse to print something!