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I think you are right, Rob. The unit needs to be automated to some level so that operators don't have to be experts, or have to handle hot components.

At almost mid-way up from the floor there is a shelf. That is counter height. The video shows green bean being dumped into a hopper. That's in the center of the drawings just below the counter. It has a funnel-shaped bottom connected to a tube. I think you are right, the suction created by the vacuum motor exhaust transports the beans into the RC.