3D Printer Filter

This is a simple filter box that uses a 50mm fan and a standard car air filter to provide a filter for your 3D printer.
The filter it is designed for is the [MGA46139](http://www.oreillyauto.com/site/c/detail/MGD3/MGA46139/02512.oap?year=1989&make=Buick&model=LeSabre&vi=1019494&ck=Search_02512_1019494_2519&pt=02512&ppt=C0023); a cheap off the shelf filter.

I placed mine in the upper center and have the fan pointed downward within my enclosure.

I included the main body as one piece and spl