Wanhao i3 Duplicator / Duplicator Plus Upgraded Spool Holder

This is the final revision of my Wanhao i3 Duplicator i3 & i3 Plus spool holder. For larger center spools to prevent 'rocking' of the roll during small increment of filament draw. Threaded on one end to attach to the original Wanhao filament mount.

For smaller filament rolls with a smaller center, use my other spool holder which can be found here:
http://www.thingiverse.com/thing:2052674

If you make one, I look forward to seeing it and also any feedback. I am still learning the software