About this 3D model

I bought some filament from Amazon, and it does not fit the Replicator2 spindle, the center is 3 Centimeters, so I figured why not make my own. I Took measurements from the original Makerbot spindle, and designed a new one in 3dMax that works with 3 Centimeter spool holes. This also works with the original Makerbot spools as well, and it does not require pinching to get the spool on.