Very exciting hack, more please...

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This is really an exciting tool. I am impressed with the work you've done with this.
Have you given any thought to using beater bars and some sort of textured concave vs the cutters? Seems like this would give you a more efficient thresh? I really hope you put a few technical specs up for us to look at, cut lists etc. This is a good start to my dream of a pedal operated threshing machine. My hope is that there would be some way to have a complete unit or semi-complete unit with a centrifugal fan incorporated running off the same power source to automatically winnow grain coming out of the concave as it passes over some screens or possibly even some kind of straw-walker arrangement. Thanks so much for adding this. Please show us more.