Geeetech I3 Spool Spacer

So I have the spool holder that came with my Geeetech i3, and early on was annoyed about how the spool would roll out the filament in "chunks." I had made a spacer to take up the slack, and this year ordered a filament that used a smaller diameter for their spool. I modified my original, at least what I could find since the file for the original nut was MIA, with a taper to better accommodate different size spools.

This should fit spools with diameters from around 48mm up to around 65mm. I can imagine that most of them are rather uniform and only come in a couple of different sizes.