Air mixer (for cold acetone vapor bath)

If you don't using some air mixer with acetone vapor bath, you must begin!
Time for smooth surface decreasing by 2-3 times, and evenly spreading.

**In files** you can find solidworks project, where you can change hole (diameter and height) for shaft of your motor (I used from old cd-rom [like this](http://www.ebay.ie/itm/272231542198)), and also you can change height and length of blade for your box size