Build of a permanent magnetic chuck / base / vise. Part I: prototyping

As far as I know, there are no videos on RUclips about building a magnetic chuck based on permanent magnets. Apparently the traditional build is too demanding for a home shop. In the RUclips videos I only see transformers used in big heavy bulky electromagnetic chucks. I want something smaller, nicer and more refined suitable for a mini mill, based on neodymium magnets. Here's the prelude to an attempt to do so.
Link to the video I quoted: • How To Build A Magneti...
Music:
Keys of Moon, Awakening Dew
MaxKoMusic, Beauty
Mozart, Clarinet concerto in A major
Aleksey Chistilin, Waterfall