Open Source Orbital Shaker

Here is my entry to the Open Call for Open Science Equipment Contest, detailed here:
http://thecitizensciencequarterly.com/2010/11/25/open-call-for-open-science-equipment/

Start with the video to see what this is all about:
http://www.youtube.com/watch?v=1d4_SQBTFjg
http://vimeo.com/17497511

Download the .zip file to get everything, or get the individual pieces you want.

This is an open-source orbital shaker for mammalian cell and tissue culture and for bench-top science. The orbital shaker fits inside a standard 37 ºC/5% CO2 cell incubator and puts out no heat so you can load up the incubator full of these things. We have used them for 2 weeks now and the design is very simple, inexpensive, and scaleable. Our cells are growing happily in these shakers.

Orbital shakers are typically ~$1,500 and even more expensive if you need one that is designed for a cell incubator so that it will not put out any heat (incubators only have heating and not cooling functions, so if equ