Bean Threshing Machine

We have been threshing beans with a bean box, and we have blueprints for a bicycle powered multi-purpose threshing machine we yet have to build, but I'm part of a community food resiliency organization who specifically want a powered threshing machine that runs on electricity or fossil fuels. The problem is that most available motorized small-scale threshing machines I find are for grains (sometimes only one kind of grain) or don't specify if they can be used for different types of seeds. I turn to you, fellow permies, for your knowledge and experience.

I've seen bean/pea shellers that run on a handheld mixer or drill. They have rubber rollers that squeeze them out.

There are many available
bean / pea sheller

Build the pedal-powered one, but stick an electric motor where the pedals would be.

Later, if it needs to be run without electricity, it should be easier to switch it back to pedals than most threshers would be.

One possibility.....    

You could Email them to find out particulars.

Thanks for your help, Permies. I mostly have this small organization convinced that a locally made machine makes more sense than buying one that not only is made somewhere else and needs to be shipped in, but the parts if/when it breaks would likely have to be shipped in as well. The hiccough is that they still want to apply for this grant for small farm equipment to get it and other bits, so we're still looking for a ready-made machine that could just be bought, but this is mainly for the application form for this grant.
At this point, I'm mostly looking for anecdotal information about actually experience in using/having either bicycle powered threshers or motorized threshers.
I'm also including the link to the bicycle-powered thresher plans I've presented to them. This is just the proposal and the descriptive videos, I actually have the blueprints.
https://farmhack.org/tools/bicycle-powered-thresher

Here is a little pea/bean sheller I made from scraps.  It has a dc motor that will run from 9-30v.