Eco3D Filament Spool Hole Reduction for original PRUSA i3 Printer

I started to use filaments from new source:
http://www.eco3dfilament.com
and I wanted to make the reduction for the spools as well. So I remixed my original Prusa filament spool reduction.
Reduction_ECO_big_hole.stl is for 0.25kg filament spool
Reduction_ECO_small_hole.stl is for 1 kg filament spool

Btw, check them out if you want. They make good filaments.

While I was into it I added universal Scad file for your convenience. You just edit three basic variables and produce your own dif