Winnower needed!! Help

We are cacao farmers and chocolate makers working 4 kilos at a time. We hand winnow and we would like to either build a winnower (electric) ourselves as we are in Costa Rica or buy one. Any recommendations or pictures or designs are very much appreciated. Thanks so much! Pura vida
updated by @talamanca-organica-cacao-fine-chocolate: 04/11/15 03:45:05PM

Take a look at the Sylph Winnower plans from Chocolate Alchemy. It's pretty simple to build and only need a vacuum cleaner as a power source. I have one and use it for small batches. Pura vida from Flamingo Beach!

Thanks cheebs! We have lots of beans if you need.