About this 3D model

I made the 40mm version... http://www.thingiverse.com/thing:33630 I used a old 40mm fan that i had in my "old stuff box", unfortunaly the fan died last week. I noticed that the 40mm wasn't powerful enought(maybe because it was old and re-used). Nonetheless i kick it up a notch by making an adapter for a 80mm fan.