Share 'Winnowing equipment for hobbyist'

I can't help but drool at the vertex winnowers from Boston Cocoa. But dropping 35k into something that I'm currently not doing for profit is just not an option. I'm asking other bean to bar hobbyist on what are they doing for the winnowing process? I only need to winnow about 2-10kg a batch. I have tried using a blow-dryer on cracked beans to rather disappointing results. Thank you. Ning Geng