At 4 mins 6 seconds in this youtube video, there is a honey extractor. It is an extractor that extracts honey with frames in the honey supers. To me this looks very easy to make and makes sense. That said, perhaps there is something I am not thinking about that would be a problem. Has anyone seen one of these? Any experiance using one? What are they called? Know where I could buy one or get plans to build one?